ALUMINIUM PRODUCTS

CATALOGUE
We Care for the Air You Breathe
 TABLE OF CONTENTS
Aluminium Products Catalogue
COMPANY PROFILE A

ENGINEERING GUIDE B

GRILLES & REGISTERS C

LINEAR BAR GRILLES & REGISTERS D

LINEAR SLOT DIFFUSER E

CEILING DIFFUSER F

PLAQUE CEILING DIFFUSER G

ROUND CEILING DIFFUSER H

DISC VALVE I

LOUVERS J

JET & DRUM JET DIFFUSER K

SWIRL DIFFUSER L

FLOWBAR SLOT DIFFUSER M

LAMINAR FLOW DIFFUSER N

SECURITY GRILLES & REGISTERS O

FLOOR GRILLE P

ROUND STEP & FLOOR SWIRL DIFFUSER Q

 A

COMPANY
PROFILE
We Care For The Air You Breathe

www.flowtechind.com Part of
 COMPANY PROFILE

Company Profile Index

ABOUT US A1

TRADEMARKTM A1

OUR VISION A1

OUR MISSION A1

OUR CORE VALUES A1

PRODUCTS A2

TEST CERTIFICATE A2

GENERAL A3

WORKS A3

CUSTOMER SERVICE A3

CONTACT DETAILS A3

OUR NETWORK A3

PROJECT REFERENCES - UNITED ARAB EMIRATES A4

PROJECT REFERENCES - MIDDLE EAST & AFRICA A5

 COMPANY PROFILE

ABOUT US
Flowtech Air Distribution has been launched by Faisal Jassim
Industries (FJ Ind) in 2000 in association with a group of
specialists in the manufacturing of Air Terminals. M/s Faisal
Jassim Industries is a well established group. especializing
in the engineering, manufacturing, and trading of equipment
for the building services industry, in general, and the air
conditioning sector, in particular.

TRADEMARKTM­
Our products are branded as “FLOWTECH”.

OUR VISION
To be the preferred partner in supplying products for the
building services industry.

OUR MISSION
• To provide our clients competitive and premium quality
equipment and services.
• To strengthen the acceptability of our brands with clients
and contractors throughout the GCC.
• To seek growth through new ideas, new products and strong
partnerships.
• To set offices or develop factories in the GCC market closer
to our customer base.
• To recruit, train and retain the best talent in the industry.
• To continuously improve our business processes leading to
prompt and efficient sales and after sales services.

OUR CORE VALUES

Character
We are respectful, honest, positive and fair to all stakeholders.
Continuous Improvement
We embrace a culture of continuously improving our products,
our processes and ourselves.
Partnership
We strive to achieve our common goals through interdependency
and collaboration
Commitment
We take ownership of achieving our mission to the complete
satisfaction of all our stakeholders

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 COMPANY PROFILE

PRODUCTS
Our range of products includes: Grilles, Registers, Linear Diffusers, Ceiling Diffusers, Jet Diffusers, Swirl Diffusers, Round
Ceiling Diffusers, Linear Slot Diffusers, Sand Trap Louvers, Fresh Air Louvers, Disc Valves, Non Return Dampers, Volume Control
Dampers, Fire Dampers, Variable Air Volume, CAV, Pressure Relief Dampers, Sound Attenuators, Acoustic Louvers, Non Return
Dampers and Motorized Fire & Smoke Dampers.

AIR TERMINAL DEVICES LOUVERS NOISE CONTROL DEVICES

Exhaust Air Louver &
Grilles & Registers Diffusers Sand Trap Louver Sound Attenuator Acoustic Louver

AIR CONTROL DEVICES

Volume Control Dampers Pressure Relief
Dampers Non Return Dampers Variable & Constant Air
Volume Terminal Units

TEST CERTIFICATE
FLOWTECH have tested their range of Air Terminals and obtained VAV boxes tested as per AHRI Standard 880 “Standard for
Intertek Certification on most of the performance data. In fact, Performance Rating of Air Terminals”
our Air Terminals are tested in accordance with the ASHRAE 70
Standard “Method of Testing for Rating Performance of Air Sound Attenuators tested for “Standard Method of Testing Duct
Outlets and Inlets”, which incorporate ADC 1062: GRD-84 Test Liner Materials and Prefabricated Silencers for Acoustical and
Code for Grilles, Registers and Diffusers. Airflow Performance” according to ASTM Standard E477-06a.

Louvers are tested in accordance with AMCA 500-L and BS EN 13181 We are committed to follow up on this, by obtaining all
relevant quality assurances, ensuring reliability and total
Volume Control Dampers and Non Return Dampers are tested in customer satisfaction.
accordance with AMCA 500-D

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 COMPANY PROFILE

GENERAL
From its inception, Flowtech invested in the best machinery
available in the field, to build a product to international
standard. We have recruited a team of experienced craftsmen
with proven experience, able to manufacture standard Air
Terminals, as per our range of product or special designs, as
per the project requirement. We have set up our production
lines to allow maximum flexibility, adapting quickly to demand
changes, ensuring best deliveries with consistent good quality.

WORKS
Our factory is located in Dubai industrial zone with our own
powder coating plant, giving us flexibility to offer, our customer
our standard finishes or any special coating needed on their
project. Our raw material is procured locally from Dubai, who have
built worldwide name for the purity and quality of its Aluminium.
This has ensured a continuous availability of raw material at a
very competitive rates, with a world-renowned quality.

CUSTOMER SERVICE
Our service oriented staff have a complete understanding of
Air Distribution Engineering and will assist you to meet yours
needs and requirements, to create a thermally balanced,
comfortable and highly effcient environment in your building.

CONTACT DETAILS
FAISAL JASSIM INDUSTRIES (L.L.C.)
P.O. BOX 1871 PLOT # 598-1152
DUBAI INVESTMENT PARK - DUBAI, UAE
Tel. # 04 810-5105
Fax. # 04 810-5106
Email: fjtrdg@emirates.net.ae
Website: www.faisaljassim.ae
FLOWTECH FACTORY
Tel: +971 4 8105266
Fax: +971 4 8105114
Email: flowtech@fjtco.com
Website: www.faisaljassim.ae

OUR NETWORK

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 COMPANY PROFILE

PROJECT REFERENCES - UNITED ARAB EMIRATES

Project : Rove Hotel at City Walk Project : Intercontinental Resort Hotel, Mina Al Arab, RAK
Consultant : M/s Arch Group Consultant : M/s P&T Architech and Engineers LTD
Contractor : M/s Shapoorji Pallonji Middle East LLC Contractor : M/s RAK Properties LLC
MEP Contractor:M/s Trinity Engineering Services LLC MEP Contractor:M/s AL Ali Construction & Development LLC

Project : Khalifa University, Abu Dhabi

Project : Zayed University, Abu Dhabi
Consultant : M/s Elite Design
Consultant : M/s AECOM
Contractor : M/s Z Contracting Company
Contractor : M/s AL Habtoor Murray & Roberts JV
MEP Contractor:M/s Fibrex Construction Group

Project : The Fields - 1028 Villas, Meydan, Dubai Project : U.A.E Pavilion at EXPO 2020, Dubai
Consultant : M/s Chawla Consulting Engineering Consultant : M/s Calatrava International
Contractor : M/s GBH International Contracing LLC Contractor : M/s Arabtec Construction LLC

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 COMPANY PROFILE
PROJECT REFERENCES - MIDDLE EAST & AFRICA

Project : Marriot Hotel-OCEC, Seeb, Muscat, Oman Project : Aspire Academy Expansion, Qatar
Consultant : M/s WS Atkins Consultant : M/s KEO International
Contractor : M/s Bahwan Engineering Contractor : M/s Construction Development Company

Project : King Fahad Medical City, KSA Project : Ministry of Interior Headquarter Jeddah, KSA
Consultant : M/s Dar Engineering Consultant : M/s Archen Engineering
Contractor : M/s Drake & Scull KSA Contractor : M/s El Seif Engineering Contracting

Project : Kuramo Beach Residence - Lagos Project : Parliament Building New Capital, Egypts
Contractor : M/s ITB Nigeria Limited Contractor : M/s Shaker Consultancy Group

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 B

ENGINEERING
GUIDE
We Care For The Air You Breathe

www.flowtechind.com Part of
 ENGINEERING GUIDE

Engineering Guide Index

TERMINOLOGY B1

INTRODUCTION B2

COMFORT CRITERIA B2

SPACE AIR DIFFUSION B2

SELECTION FUNDAMENTALS B3

SOUND PRESSURE VS SOUND POWER B4

SELECTION PROCEDURE B6

CONVERSION TABLES B8

BASIC EQUATIONS B9
 ENGINEERING GUIDE

TERMINOLOGY
AIR DISTRIBUTION AIR TERMINAL DEVICES
The transportation of a specified air flow to or from the treated space by A device located in an opening provided at the boundaries of the treated
means of ductwork. space in order to improve a predetermined air movement within the space.

AIR DIFFUSION SUPPLY

Distribution of the air in a space, called the treated space, by means of The air flow entering the treated space.
devices, called air terminal devices, in a manner so as to meet certain
specified conditions, such as air change rate, pressure, cleanliness, EXHAUST
temperature, humidity, air velocity and noise level. The airflow leaving the treated space by means of following methods:
Extraction, Relief, Recirculation & Transfer.
TERMINAL VELOCITY
The point at which the discharged air from an outlet decreases to a given REGISTER
velocity usually 0.25 m/s or 50fpm. A grille with a damper.

THROW GRILLE
The distance, measured in meters or in feet that the airstream travels An air terminal device with multiple passages for the air, usually placed
from the outlet to the point of terminal velocity. on side walls, bulkheads.

DROP LINEAR GRILLE

The vertical distance between the centre of an outlet and the bottom of A grille with fixed linear blades, usually used in large continuous lengths.
the airstream at the end of horizontal throw.
ADJUSTABLE GRILLE
ENVELOPE A grille with aerofoil blades (louvres) which can be adjusted to vary the air
The geometrical surface of the points of an air jet corresponding to diffusion direction.
terminal velocity.
DIFFUSER
SPREAD Supply air terminal device square rectangular or circular usually placed in
The maximum total width of the air pattern in the envelope. the ceiling and consists of deflecting members for diffusion.

AIR FLOW SLOT AIR TERMINAL DEVICE

The air flow is the rate of quantity of air passing through the air outlet A device with one or multiple slots for continuous long rectangular opening
to the room so as to achieve the desired design conditions such as with or without adjustable member to vary the air flow rate and direction.
temperature, noise level, etc.
NOZZLE
TOTAL PRESSURE An air terminal device designed to generate a low energy loss and thus
Sum of at the static & velocity pressure. produce a maximum throw by minimum entrainment.

INDUCTION DAMPER
Process by which the primary air sets into motion an air volume, called A device used to control the volume of air passing through a terminal by
secondary air, in the room. varying a crosssectional area.

COANDA EFFECT LOUVRE

Also called ceiling or wall effect. Tendency of an air stream to follow a wall A device used for intake air from atmosphere with bird screen and the
plane when the stream is in contact with the wall. This effect increases blades at 45° inclination to eliminate rainwater.
throw and reduces drop.
FIRE DAMPER
NOISE LEVELS Device which is installed in an air distribution system between two fire separating
Decibel is the unit used to measure sound. It is logarithmic ratio of two compartments and is designed to prevent propagation of fire and smoke.
sound pressure levels (SPL Lp) or sound power levels (SWL Lw) where one
is a reference level. The most commonly used criteria are Noise criteria SOUND ATTENUATOR
curves (NC Level), Noise rating curves (NR Level) and dB (A). Device which is inserted into the air distribution system and designed to reduce
airborne noise which is propagated along the ducts.

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 ENGINEERING GUIDE

INTRODUCTION SPACE AIR DIFFUSION

The design and selection of air distribution equipment in today’s buildings Proper selection of air diffusion devices requires a basic knowledge of the
presents one of the more unique challenges for mechanical designers. Unlike mechanics of room air distribution. Figure 2 illustrates the interactions of the
other mechanical equipment required for these environmental systems, major factors influencing room air distribution. These factors are described below:
the air distribution equipment selection must combine a proper choice of
engineered products efficiently provide conditioned air to the space while Primary Air
adding architectural features which compliment the interior design.
Primary Air is defined as the conditioned air discharged by the supply
With today’s emphasis on occupant comfort, air quality and energy outlet plus entrained room air which lies within an envelope of arbitrary
conservation, the proper selection of air outlets cannot be overlooked. It velocity, usually taken as 150fpm. It is this air which provides the motive
is the intent of this section to provide a concise approach to the proper force for room air motion.
selection of air distribution outlets. The general information is given below
while the actual selection procedures of the air outlets are given in the Total Air
respective technical guides.
Total Air is defined as the mixture of primary air and entrained room air which
is under the influence of supply outlet conditions. This is commonly considered
COMFORT CRITERIA to be the air within an envelopeof 50 fpm (or greater) velocity. Temperature
Comfort difference between total air package and the room air creates buoyant effects
which causes cold supply air to drop and warm air to rise.
The true measure of the performance of any environmental system is that it
maintains comfort of the occupants of the space it serves. Provided the total
amount of heated or cooled air required to thermally satisfy the requirements Drop
of the space is available, the comfort level within the space becomes totally The drop of the cool total air, as shown in Figure 2, is the result of the
dependant upon the space air distribution. In general, comfort when related to vertical spread of the airstreams due to entrainment of room air and
anatomy can be described as the condition that exists when the heat the buoyancy effect due to the density differences between the total
generated by the body is balanced by some of the metabolic heat transfers air package and the surrounding primary air. The term “density” is very
through convection, conduction and radiation with the air, wall surfaces and important as drop is primarily dependent upon the mass flow of the total
other heat transfer mechanisms in the space. The definition of “comfort” air. Drop can be minimized by spreading the air uniformly over the ceiling
allows us to identify and control the factors which influence the metabolic surface, thus reducing the mass flow per unit surface area.
heat transfer within the space. These factors are:
• Dry bulb temperature Spread
• Relative humidity
• Mean radiant temperature of the surroundings The “Spread” of an outlet is defined as the divergence of the airstreams in
• Air movement a horizontal or vertical plane and is a function of the outlet geometry.
• Metabolism
• Clothing worn by occupants
Of these, metabolism and clothing are predetermined by the function of the
Occupied Zone
occupants within the space. Dry bulb temperature and relative humidity are The Occupied Zone is usually defined as the area within 6ft. of the floor
controlled by the thermal effects of the air distribution system. The air and not within 1ft of the boundaries of the space (walls, etc.). As this is the
movement is a function of the selection of the air diffusion devices employed area of occupancy, it is desirable to avoid excessive draft velocities and
and is the primary controllable factor by which comfort is affected in the space. temperature differences within the space.
Proper air diffusion prevents thermal stratification and stagnation in order to
approach a homogenous mixture of room air. Mean radiant temperatures can Figure 1 - Comfort Zone
also be affected by proper location of outlets to prevent substantial heat transfer
to and from room surfaces.

Draft Temperature
Extensive studies have resulted in relationships between local temperatures,
velocities and comfort reactions. On the basis of the temperature and velocity
Velocity fpm

at a specific point an effective draft temperature can be calculated for that

location. The draft temperature is calculated by the equation:
Ø = (T-TC) - 0.07 (V-30)
where:
Ø = draft temperature T = local temperature
Tc = control temperature V = local velocity
Research indicates that a high percentage of people are comfortable where
the effective draft temperature difference is between -3° F and +2° F and
the air velocity is less than 70 fpm. This comfort zone is illustrated as the
shaded area in Figure 1. Local Air Temp. Ambient Temp. ° F
(T-Tc) ° F

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 ENGINEERING GUIDE

Figure 2. Space Air Diffusion with Overhead Cooling

Surface Effect / Coanda Effect Return

Drop can also be effectively reduced by use of the surrounding ceiling The return air inlet has very little effect on room air diffusion
surface. When the supply air velocity is sufficiently high, a negative or low regardless of inlet type or location. However, return air inlets should
pressure area is created between the moving air mass and the ceiling at be located at sufficient distance from the supply outlet so that
or near the supply air outlet. This low pressure area causes the moving air short circuiting of supply air does not occur. It may be desirable to
mass to cling to and flow close to the ceiling surface. This principle is locate the returns in the stagnant zone to remove unwanted warm
known as the “Coanda Effect”. Good air distribution design makes use of or cool air. For cooling, a high sidewall or ceiling return will remove
room surfaces to help keep the supply air outside the occupied zone. warm air from the space.

Room Air SELECTION FUNDAMENTALS

Finally, we come to the medium through which all metabolic heat transfer occurs Several factors influence the selection of an air outlets. These factors can
and thus the most critical factor in controlling human comfort - the room air. be divided into two groups: design factors and performance factors.
The room air consists of all the other air within the space which is not included
in the total air package. Proper air distribution attempts to condition this room
air to maintain draft velocities and temperatures within those ranges shown in
1. Design Factors:
Figure 1. This velocity of air within the occupied zone is known as “Room Velocity”.
Room air movement is created by its gradual induction toward the primary and
Function
total airstreams. It is this constant mixing that provides the mechanisms for The most obvious question is that of primary function supply or return. Diffuser
heat transfer between the supply and room air. When air movement does not designs, grille blade profiles and blade spacing are all performance derived,
occur (usually as a result of insufficient outlet velocities or poor outlet location), thereby making the outlet’s function “non-interchangeable”, in most cases.
a stagnant layer of room air is formed. Above that layer (or below in the case
of overhead heating), proper heat transfer does not exist and temperature Location
stratification occurs. This is illustrated by the temperature gradient curve shown Our field of selection is further narrowed by knowing where the outlet is to be
in Figure 2. It is always desirable to keep the stagnation layer above the occupied located within the space (i.e. sidewall, ceiling or floor). This more than anything
zone in cooling and as near to the floor as possible when heating from above. else determines the generic type of outlet to be used. Two factors can influence
outlet location, desired performance and/or architectural/physical constraints.
Convection Currents Performance location considerations could include spot cooling or perimeter
The total air package can easily be influenced by several factors within the heating. Physical/ architectural constraints could, for example, consists of an
space. One of these factors which occur in exterior zones of buildings is the inaccesible ceiling forcing the use of sidewall or floor outlets.
natural convection currents which result from a hot outside wall during cooling
(Figure 2) or a cold outside wall during heating. The upward movement of air in Air Volume
the vicinity of the hot surface tends to oppose the total air movement in The actual air volume required to handle the heating/cooling load will also
overhead cooling. This can act to reduce the outlet throw values or even cause have an effect on the model of outlet used. Generally, the larger the volume
the colder total air to leave the ceiling and create drop into the space. The per outlet, the more difficult it is to handle comfortably. Some air outlets,
downward movement of cold air in the vicinity of a cold surface can create due to design considerations and basic concept, are more effective at
cold draft within the occupied space. In the case of overhead heating, the only handling large air volumes.
effective way to minimize these drafts is to direct a high velocity jet of warm
air over the wall surface to reduce the difference between the temperature of
the surface and that of the room air. Maintaining surface temperatures as near
that of the space as possible also minimizes radiation heat transfer potential
between the surface and the occupants, resulting in improved comfort response.
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 ENGINEERING GUIDE

Natural Convection Sound / Pressure Drop

Natural Convection air currents created by cold walls/ windows or localised Pressure drop and sound are important to the overall system design and
heat sources should also be considered when planning room air motions. performance, however they do not directly affect the room air distribution.
For example, convective air-velocities of over 50fpm can be expected
on some cold window applications and will, if unchecked, dominate the
room air motion. The air outlet may be required to blow warm air down the SELECTION FUNDAMENTALS
window or wall from the ceiling or up from the floor. Each situation would Noise control in air conditioning systems is, in many cases, just as critical
require different treatment and totally different outlet performance. The as the environmental conditioning itself. Sound is transmitted through
buoyancy effect of warm air makes it more difficult to blow down the cold the duct system and is also generated by some of the duct elements
window while it would assist the throw of a floor outlet. including diffusers, dampers, volume control and straightening devices,
terminal boxes, fans and even the ducts themselves. Noise is defined as
2. Performance Factors: objectionable or unwanted sound. The absence of sound created by the
air conditioning system can also be annoying. Properly designed, this
Throw sound can mask unpleasant noise of conversations, office machinery,
etc. to create a more workable environment.
Throw is by definition the distance from the outlet face to a point where the
velocity of the airstream is reduced to a specified velocity, usually 150, 100
or 50fpm (Figure 3). Throw is primarily a function of mass flow and outlet Sound / Pressure Drop
velocity and therefore can be reduced by decreasing either of these values. Basically sound is a pressure variation that the ear can detect. These pressure
variations are caused by a vibrating object or surface, or by turbulent air or gas.
Drop As sound measurement is primarily concerned with human comfort, its
Whenever cool supply air is introduced into a warmer space, its natural measurement reference points reflect the limits of human hearing. That
tendency will be a downward movement. If the supply air projects into the is to say, the lower limit is 20 µPa (20 millionths of a Pascal), the pressure
occupied space, uncomfortable drafts will occur. Drop can be minimized by change at the threshold of human hearing. The human ear can withstand
utilizing the surface effect of ceilings. Outlets located in or near the ceiling pressure changes more than a million times this lower threshold. This
will exhibit less drop than outlets located on exposed ductwork. Reducing the would result in a rather large and awkward measurement scale.
supply air volume and increasing supply air temperature will also reduce drop. To avoid this problem a logarithmic scale called the decibel (dB) scale was
developed. This decibel measurement is simply a logarithm of the ratio
Figure 3 of the measured sound pressure and an agreed reference pressure (in
this case if the threshold of human hearing 20 µPa) :

Lp = 20 LOG Po[__]
P

Where:
Lp = Sound Pressure Level dB
P = Pressure of Sound Wave (Measured)
Po = Reference Pressure
This result in a more compressed and manageable measurement scale.

SOUND PRESSURE VS SOUND POWER

To this point we have discussed sound pressure levels measured in dB
Spread based on a reference pressure (.0002 micro bar or 20 µPa). Sound power
Delivering the air in a spread pattern tends to reduce both the throw and levels of an outlet reflect the total acoustical energy output of a source.
drop of an air outlet. Dissipating the air stream over a wider area increases A sound source has a certain amount of sound energy or power level. The
entrainment and reduces the mass flow per unit surface area (Figure 4). sound pressure measured in the room will be a function of the sound
power generated by the source as well as distance from the source to
Figure 4
the measurement point and the amount of sound energy absorbed by the
walls and transferred through the walls, windows, etc.
Sound power levels cannot be measured directly. It is usually calculated
using sound pressure levels measured in the laboratory with known sound
absorption characteristics. Sound power levels are most commonly
referred to in decibels (dB), similar to pressure levels, only the reference
is to a power (usually 10watts) instead of a pressure. Most performance
data will be presented in sound power levels as it establishes a common
reference point and eliminates room absorption variables.

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 ENGINEERING GUIDE

Frequency NC values give a weighted value of the octave band analysis as perceived by
the human ear. A single number NC is often used by manufactures to rate
The pressure variations that make up sound occur over several frequencies. the noise of their equipment, particularly grilles, registers, and diffusers.
The frequency is measured in cycles per second or hertz (HZ). Although
the normal range of hearing for a human is between 20HZ and 20,000HZ,
it is most sensitive to sounds between 2KHZ and 5KHZ and is less sensitive
Addition of dB Levels
at higher and lower frequencies. Most naturally occuring sounds produce Sound power levels and sound pressure levels expressed in decibels (dB) are
several pressure waves each at its own frequency and amplitude (dB). logarithmic functions and therefore cannot be added directly. Rather than
This is what is known as broad band noise, as opposed to sound made determining the combined effect of two sound sources mathematically, a
of a single frequency termed a pure tone. The equipment we deal with simpler approach is provided in Figure 7.
produces broad band noise.
Figure 6
To better analyze the characteristics of a sound, it is necessary to divide
the sound into several bands, each of which contains a limited range of
frequencies. The sound pressure level is then measured in each frequency
band or octave band. Figure 5 illustrates the frequency range and center
frequency of octave bands 1 to 8.
Typically for air distribution systems only bands 2 to 7 are considered.

Figure 5

Note that when two sound sources are equal value, the resultant will be 3 dB
higher than either source. If the difference between two sources is greater
than 10 dB, the contribution from the quietest source can be ignored. Figure
7 can also be used when several sources are to be considered. The different
sources are added in pairs as shown below:
NC Curve
A method has been developed that allows us to generate a single number
to represent the sound level of a device. This single number is called the
NC or noise criteria and it makes allowances for the various dB levels
in each of the octave bands and human sensitivity to each of these
frequency bands.
Sound pressure levels are determined in each of the desired octave bands.
These pressure levels are plotted on a standard NC curve from Figure 6. The
highest pressure level when measured against the NC curve, regardless of
frequency, determines the NC of the outlet.

Figure 7

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 ENGINEERING GUIDE

SELECTION PROCEDURE When selecting outlets for VAV application, both minimum and maximum
air quantities must be considered for throw. Although many models of
Outlet Selection outlets provide excellent horizontal air pattern at extremely low flows,
The outlet type and size must be carefully selected so as to provide uniform throws may be reduced below acceptable limits. Slot diffusers tend
air temperatures and satisfactory velocities within the occupied zone. In to maintain reasonable throw at low air volume and are therefore a good
addition noise levels must be acceptable. If these criteria are met then a high choice for this application.
level of comfort will be achieved for the occupants of the conditioned space.
In order to properly select and size an outlet, a number of performance Spread
factors must be taken into account. Spreading the air pattern dissipates the air stream over a wider area and
increases entrainment. This reduces the mass flow per unit surface area,
Throw which in turn reduces throw. Some outlets are designed to produce a
Achieving the proper throw for a specific application is critical to proper spread patten due to their geometry while others have adjustable vanes.
outlet selection. Throw data is usually presented at terminal velocities of
50fpm (0.25m/s), 100fpm (0.50m/s) and 150fpm (0.75m/s). Generally outlets Air Volume
should be selected so that the throw at 50fpm (0.25m/s) terminal velocity Throw is directly related to mass flow, therefore a reduction in air volume
equals the distance from the outlet to the boundary of the conditioned per outlet will reduce the throw. This can be achieve by utilizing more
space. In most cases, this criteria will produce acceptable results. outlets with less air volume per outlet. For linear diffusers or or grilles
When an air stream strikes a surface, it tends to spread and follow the the same thing can be achieved by dividing the outlet into active and
surface until the velocity dissipates. The total horizontal and vertical inactive sections (Figure 10). Each active section handles smaller quantity
distance travelled by the air stream is equal to the tabulated throw of the of air, thereby reducing the throw. In order to effectively separate the
outlet (Figure 8). For high ceiling applications it may be desirable for the air pattern, the outlet should be divided by minimum inactive length as
throw to exceed the space boundary (ceiling) and travel down the wall illustrated in Table 1.
toward the occupied zone. However, penetration of the occupied zone
Table 1. Inactive / Active Sections
should usually be avoided.

Figure 8

Figure 10

In addition to physical boundaries created by walls or partitions, boundaries

can be created by the collision of two air patterns (Figure 9). Where
two patterns will meet, the outlets should be selected so that the throw
is equal to one half the distance between the outlets. For high ceiling
applications, it may again be desirable for the throw to travel downward Drop
toward the occupied zone. Throw is again equal to the horizontal and
Since a velocity of 50fpm (0.25m/s) or less is desirable in the occupied
vertical distance travelled by the air stream.
zone, drop should be limited to a terminal velocity of 50fpm (0.25m/s),
Figure 9 6 feet (1.8m) from the floor. At several method can be used for reducing
drop for side wall grilles.

1. Mounting the grille close to the ceiling creates a surface effect and
reduces drop.
2. Deflecting the air pattern upward reduces drop.
3. Spreading the air pattern reduces drop.
4. Reducing the air volume reduces drop.
5. Reducing the throw reduces drop.
Drop for ceiling diffusers is rarely catalogued as it is normally of no
It should be noted that most catalog throw data is presented for isothermal concern. However for applications with low ceiling heights or when large
conditions, i.e. supply air temperature equals room temperature. During volumes per outlet are required, the drop should be considered.
cooling the denser supply air will shorten the horizontal throw to approximately
75% of tabulated values.

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 ENGINEERING GUIDE

ADPI Table 3 illustrates the range of T/L values which will result in optimum
By definition the ADPI is the statistical percentage of the points when comfort conditions for various outlet types at several room loads. By
measured uniformly within the space whose draft velocities and temperatures selecting a throw from the catalog data which produces the required T/L
fall within comfort criteria established in Figure 1. The higher the ADPI ratios, an acceptable ADPI rating can be achieved.
rating the higher the comfort level within the space. Generally
an ADPI of 80 is considered acceptable. Noise Criteria
Most air outlets are catalogued with a single NC (Noise Criteria) sound
Through extensive testing, relationships have been developed between
pressure rating based on a 10dB room absorption. This NC value assumes
ADPI and the ratio of throw over characteristic length (T/L). The throw
an average room and an approximate distance of 5 feet from a single
is the isothermal throw at a selected terminal velocity taken from the
sound source. These assumptions are reliable for most applications.
catalog performance charts. The characteristics length is the distance
from the outlet to the nearest boundary. Table 2 provides definition of Table 5 illustrates the ASHRAE recommended space NC values for many
characteristic length for various outlet types. commercial air conditioning applications.

Table 2 Outlets should be selected so that the tabulated NC levels are within
these design goals.
Diffuser Type Characteristic Length, L
All outlet sound data is for a single source. Allowance must be made for
High Sidewall Grille Distance to wall perpendicular to jet
Circular Ceiling Diffusers Distance to closest wall or intersecting air jet
multiple outlets when this occurs in a space since the overall noise level
Sill Grille Length of room in the direction of the jet flow may be the resultant of more than one outlet. Table 4 illustrates the
Ceiling Slot Diffuser Distance to wall or midplane between outlets additive effect of multiple outlets of equal sound.
Perforated, Louvered Ceiling Diffusers Distance to wall or midplane between outlets

Table 3

Room Load T50/L for Maximum For ADPI Range of

Terminal Device
Btu/h.ft2 Max. APDI APDI Greater than T50/L
High 80 1.8 68 - -
Sidewall 60 1.8 72 70 1.5 - 2.2
Grilles 40 1.6 78 70 1.2 - 2.3
20 1.5 85 80 1.0 - 1.9
Circular 80 0.8 76 70 0.7 - 1.3
Ceiling 60 0.8 83 80 0.7 - 1.2
Diffusers 40 0.8 88 80 0.5 - 1.5
20 0.8 93 90 0.7 - 1.3
Sill Grille 80 0.7 94 90 0.8 - 1.5
Spread 60 0.7 94 80 0.6 - 1.7
Vanes 40 0.7 94 - -
20 0.7 94 - -
Ceiling 80 0.3* 85 80 0.3 - 0.7
Slot 60 0.3* 88 80 0.3 - 0.8
Diffuser (for T100/L) 40 0.3* 91 80 0.3 - 1.1
20 0.3* 92 80 0.3 - 1.5
Perforated and Louvered 90 1.4 - 2.7
11 - 51 2.0 96
Ceiling Diffusers 80 - 1.0 - 3.4

Table 4. Allowance for Number of Outlets

B-7
 ENGINEERING GUIDE

Table 5. Design Guidelines for HVAC System Noise in Unoccupied Spaces

Room Types Recommended NC Level Room Types Recommended NC Level
Private Residences 25-35 Laboratories (with fume hoods)
Hotel / Motels Testing / research, minimal speech
45-55
Individual rooms or suites 25-35 communication
Meeting / banquet rooms 25-35 Research, extensive telephone use, speech
40-50
Corridors, lobbies 35-45 communication
Services / support areas 35-45 Group teaching 35-45
Office Buildings Mosque
Executive and private offices 25-35 General assembly 25-35
Conference rooms 25-35 Schools
Tele - conference rooms 25 (max) Classrooms up to 70m­2 40 (max)
Open plan offices 30-40 Classrooms over 70m2 35 (max)
Corridors and lobbies 40-45 Large lecture rooms, without speech
Hospital and Clinics 35 (max)
amplification
Private rooms 25-35 Libraries 30-40
Wards 30-40 Courtrooms
Operating rooms 25-35 Un-amplified speech 25-35
Corridors and public areas 30-45 Amplified speech 30-40
Performance Arts Spaces Indoor Stadiums, Gymnasiums
Drama Theatres 25 (max)
Gymnasiums and natatoriums 40-50
Concert and recital halls 25 (max)
Music teaching studios 25 (max) Large seating-capacity spaces with speech
45-55
Music practice rooms 35 (max) amplification
Reference
1999 ASHRAE Applications Handbook
ARI Standard 885-1998

CONVERSION TABLES
Table 6. Conversion Table for Basic Units

Description Imperial Unit Metric Unit From Imperial to Metric multiply by: From Metric to Imperial multiply by:
Square foot Square meter (m )2
0.0929 10.764
Area
Square inch Square millimeter (mm2­) 645.16 0.00155
Density pounds per cubic foot Kilogram per cubic meter (kg/m2) 16.018 0.0624
ounce force newton (N) 0.278 3.597
Force pound force newton (N) 4.4482 0.2248
kilogram force newton (N) 9.8067 0.102
BTU per hour watt (W) 0.2931 3.412
Heat
BTU per pound joules per kilogram (j/kg) 2326.0 0.00043
inch millimeter (mm) 25.4 0.0394
foot millimeter (mm) 304.8 0.00328
foot meter (m) 0.3048 3.2808
Length
yard meter (m) 0.9144 1.0936
ounce gram (g) 28.350 0.0353
pound kilogram (kg) 0.4536 2.2046
horsepower kilowatt (kW) 0.7457 1.341
Mass (Weight) foot pound - force per minute watt (W) 0.0226 44.254
ton of refrigeration kilowatt (kW) 3.517 0.2843
Temperature fahrenheit Celsius (OC) 5/9 (OF-32) (9/5OC) +32
ounce - force inch millinewton-meter (mN-m) 7.0616 0.1416
Torque pound - force inch newton-meter (N-m) 0.1130 8.8495
pound - force foot newton-meter (N-m) 1.3558 0.7376
feet per second meters per second (m/s) 0.3048 3.2808
Velocity feet per minute meters per second (m/s) 0.00508 196.85
miles per hour meters per second (m/s) 0.44704 2.2369
cubic foot liter (l) 28.3168 0.03531
cubic inch cubic centimeter (cm3) 16.3871 0.06102
Volume (Capacity) cubic yard cubic meter (m3) 0.7646 1.308
gallon (U.S) liter (l) 3.785 0.2642
gallon (imperial) liter (l) 4.546 0.2120
cubic feet per minute (cfm) liters per second (l/s) 0.4719 2.119
cubic feet per minute (cfm) cubic meters per second (m3/s) 0.0004719 2119.0
Volume (Flow) cubic feet per hour (cfm) millimeters per second (ml/s) 7.8658 0.127133
gallons per minute (U.S) liters per second (l/s) 0.06309 15.850
gallons per minute (imperial) liters per second (l/s) 0.7577 13.198

B-8
 ENGINEERING GUIDE

Table 7. Conversion Factors for Pressure Units

(Multiply units in Left column by appropriate factor to obtain result in units designated at the Top of vertical column)

Atm Psi Pascal Inch Hg at 32 F mm HG at 0OC

Atmosphere 1.000 14.6960 101325 29.9212 760
Psi (Pound / sq.inch) 0.068046 1.000 6894.8 2.036 51.715
Pascal (Newton / sq. meter) 9.8692E-06 1.45038E-4 1.000 2.953E-04 7.50E-03
Inch Hg at 32 F (0O C) 0.033421 0.49116 3386.39 1.000 25.40
Meter Hg at 0O C (32F) 1.31579 19.337 133.322 39.370 1.000
Meter Hg at 20O C (68F) 1.31100 19.267 132.843 39.23 996.38
mm water at 20O C (68F) 9.6600E-05 0.00014199 9.7894 0.0028907 0.0734
Inch water at 68F (20O C) 0.002454 0.036065 248.652 0.073423 1.865

Table 8. Conversion Factors for Energy Units

(Multiply units in Left column by appropriate factor to obtain result in units designated at the Top of vertical column)

Btu Joul KW h K Cal Ft. lbf

Btu 1.000 1054.35 2.92875E-04 2.51996E-01 777.649
Joul = W.s 9.48E-04 1.000 2.77778E-07 2.39006E-04 7.37560E-01
KW h 3414.43 3.60E+06 1.000 860.420 2.6552E+06
K cal 3.96835 4184.0 1.16222E-03 1.000 3085.96
Hp. h 2547.16 2.69E-06 0.7460 641.87 1.98080E+06
Ft. lbf 1.29E-03 1.355818 3.76616E-07 3.24050E-04 1.000

BASIC EQUATIONS
Air Flow Area Factor
1.) Q = VxA 4.) Af = Q
where: Q = Flow Rate, cfm (L/s) Vf
V = Velocity, fpm (m/s) where: Af = Area Factor, Ft² (m²)
A = Area, Ft² (m²) Vf = Face Velocity, fpm (m/s)

Pressure Neck Velocity

( v )2
2.) Pv = 4005
5.) Vk = Q
Ak
where: Pv = Velocity Pressure, In. (Pa) where: Vk = Neck Velocity, fpm (m/s)
Ak = Neck Area, Ft² (m²)
3.) Pt = Ps + Pv
where: Pt = Total Pressure, In. (Pa)
Ps = Static Pressure, In. (Pa)

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 C
GRILLES &
REGISTERS
We Care For The Air You Breathe

www.flowtechind.com Part of
 GRILLES & REGISTERS

Grilles & Register Index

SINGLE DEFLECTION GRILLE (SDG) & SINGLE DEFLECTION REGISTER (SDR) C1

DOUBLE DEFLECTION GRILLE (DDG) & DOUBLE DEFLECTION REGISTER (DDR) C1

FIXED BLADE GRILLE (FBG) & FIXED BLADE REGISTER (FBR) C2

EGG CRATE GRILLE (ECG) & EGG CRATE REGISTER (ECR) C2

PERFORATED GRILLE (PAG) & PERFORATED REGISTER (PAR) C3

DOOR GRILLE (DG) (NON-VISION GRILLE) C3

DECORATIVE GRILLES (DEG) / DECORATIVE REGISTER (DER) C4

FILTER GRILLE (FLG) C4

OPPOSED BLADES DAMPER C4

MOUNTING OPTIONS C5

ORDERING SYSTEM C5

GENERAL NOTES C6

TEST REPORTS C6

PERFORMANCE DATA - SI UNITS - NOTES, SYMBOLS, CONDITIONS C7

PERFORMANCE DATA: SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS) C8

PERFORMANCE DATA: RETURN AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS) C16

PERFORMANCE DATA: EGG CRATE GRILLES & REGISTERS : ECG & ECR (SI UNITS) C19

PERFORMANCE DATA: PERFORATED GRILLES & REGISTERS: PAG & PAR (SI UNITS) C20

PERFORMANCE DATA: DOOR GRILLES: DG (SI UNITS) C21

PERFORMANCE DATA - IP UNITS - NOTES, SYMBOLS, CONDITIONS C22

PERFORMANCE DATA: SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS) C23

PERFORMANCE DATA: RETURN AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS) C31

PERFORMANCE DATA: EGG CRATE GRILLES & REGISTERS : ECG & ECR - (IP UNITS) C34

PERFORMANCE DATA: PERFORATED GRILLES & REGISTERS: PAG & PAR - (IP UNITS) C35

PERFORMANCE DATA: DOOR GRILLES: DG - (IP UNITS) C36

 GRILLES & REGISTERS

SINGLE DEFLECTION GRILLE (SDG) & SINGLE DEFLECTION REGISTER (SDR)

Single Deflection Grille & Register is a type of grilles with a
single set of vertical or horizontal blades used to deflect air
in the horizontal or vertical direction respectively, to suit the
required air pattern. SDG is a grille without opposed blades
damper (OBD) and is commonly used as a side wall return air
grille. SDR on theother hand, is provided with opposed blades
damper (OBD) to facilitate precise air volume control. SDR is
usually used as a supply air register on side wall applications.
Frames and blades are made of extruded aluminium alloy
6063 to T6 Heat Treatment.
Flanges are available in 10,13,20,25 and 30mm width.
SDG & SDR can be supplied in any of the following standards
width - 150mm (6”), 200mm (8”), 250mm (10”) & 300mm (12”).
Non-standard sizes can be ordered to suit the designer
specifications.
OBD are easily removable and attached to the frame by means of
(S) clips to ensure tight grip and maximum flexibility. The damper
is made of extruded aluminium bars. The damper opening is
easily adjusted by means of a control lever that is driven by a
screw driver from the front face of the register.

DOUBLE DEFLECTION GRILLE (DDG) & DOUBLE DEFLECTION REGISTER (DDR)

Double Deflection Grille is a type of grilles with a two set of
blades - vertical and horizontal - used to deflect air in both
the horizontal and vertical directions. DDG is a grille without
opposed blades damper (OBD) and is commonly used as a
side wall return air grille. DDR is provided with opposed blades
damper (OBD) to facilitate precise air volume control. DDR is
usually used as a supply air register on side wall applications.
Frames and blades are made of extruded aluminium alloy
6063 to T6 Heat Treatment.
Flanges are available in 13,20,25 and 30mm width.
DDG & DDR can be supplied in any of the following stan-
dards width - 150mm (6”), 200mm (8”), 250mm (10”) &
300mm (12”). Non-standard sizes can be ordered to suit the
designer specifications.
OBD are easily removable and attached to the frame by means
of (S) clips to ensure tight grip and maximum flexibility. The
damper is made of extruded aluminium bars. The damper
opening is easily adjusted by means of a control lever that is
driven by a screw driver from the front face of the register.

C-1
 GRILLES & REGISTERS

FIXED BLADE GRILLE (FBG) & FIXED BLADE REGISTER (FBR)

Fixed Blade Grille is a type of grilles with a set of horizon-
tal blades fixed at an angle of 45°. FBG is a grille without
opposed blades damper (OBD) and is commonly used as a
wall mounted return air grille. FBR is provided with opposed
blades damper (OBD) to facilitate precise air volume control.
The fixed blade return air grilles are used in cooling, heating
and air ventilation.
Frames and blades are made of extruded aluminium alloy
6063 to T6 Heat Treatment.
Flanges are available in 10, 13, 20, 25 and 30mm width.
Insulating gasket (optional) is fixed around the back of the frame
to prevent infiltration of air between the frame and the wall.
OBD are easily removable and attached to the frame by means of
(S) clips to ensure tight grip and maximum flexibility. The damper
is made of extruded aluminium bars. The damper opening is
easily adjusted by means of a control lever that is driven by a
screw driver from the front face of the register.

EGG CRATE GRILLE (ECG) & EGG CRATE REGISTER (ECR)

The Egg Crate Grilles are either ceiling mounted or wall mounted
air terminal devices used as exhaust air grilles for domestic and
industrial applications. The relatively large effective area (90%)
of the egg crate grille permits better performance for return air
application. This results in low pressure drop and low noise level.
ECR is provided with opposed blades damper (OBD) to facilitate
precise air volume control.
The core of an egg crate grille is made of aluminium strips
assembled to form equally sized and distributed square cells.
The 30mm flange frame is made of extruded aluminium bars.
Insulating gasket (optional) is fixed around the back of the frame
to prevent infiltration of air between the frame and the wall.
OBD are easily removable and attached to the frame by means of
(S) clips to ensure tight grip and maximum flexibility. The damper
is made of extruded aluminium bars. The damper opening is
easily adjusted by means of a control lever that is driven by a
screw driver from the front face of the register.

C-2
 GRILLES & REGISTERS

PERFORATED GRILLE (PAG) & PERFORATED REGISTER (PAR)

The perforated air grilles are either ceiling mounted or wall
mounted air terminal devices used as return air grilles for
domestic and industrial applications.
They are composed of perforated sheets fixed to a frame.
Standard perforated face is with 3mm or 5mm diameter
holes on staggered centers. Other options are available as
per customer requirement.
The perforated sheet can be made of Stainless Steel ,
Galvanized Steel, or Aluminium powder coated to RAL 9010 to
9016 as standard.
Flanges are available in 10, 13, 20, 25 and 30mm width.
Insulating gasket (optional) is fixed around the back of the
frame to prevent infiltration of air between the frame and the
wall. Other colors available as per decorator request.
OBD are easily removable and attached to the frame by means of
(S) clips to ensure tight grip and maximum flexibility. The damper
is made of extruded aluminium bars. The damper opening is
easily adjusted by means of a control lever that is driven by a
screw driver from the front face of the register.

DOOR GRILLE (DG) (NON-VISION GRILLE)

The door grilles (Non-Vision / Partition) are flush mounted air
terminal devices used for air movement between two conditioned
spaces while preventing vision . They are constructed as inverted
V shape blades assembled one above the other, with fixed spacing
to a frame called the fixed frame. Fixed frame is installed on one
side of the partition, while a sliding frame is fixed on the other
side. Sliding frame enables the use of a door grille to suit different
partition thickness.

TYPE OF FIXING

• Visible screw fixing

• Minimum partition thickness: 25mm
• Maximum partition thickness: 55mm

C-3
 GRILLES & REGISTERS

DECORATIVE GRILLES (DEG) / DECORATIVE REGISTER (DER)

With high demand for aesthetics these days, more and more
customers are enquiring about the decorative grilles.
Flowtech decorative grilles comes in a variety of designs and
are commonly used in Majlis, atrium, etc.
Decorative grilles can have vertical or horizontal blades and a
damper, if required. Similarly, decorative grilles can have the
core and damper as required.
Available in Powdered Coated RAL 9016 as standard. Other
powder coated finishes are available as options.

FILTER GRILLE (FLG)

A washable aluminium media filter can be added to the
return grille to form a filter grille. It is fixed at the back of
the grille and can be easily removed. The aluminium filter is
25mm thick.
When combining a filter with a grille, the grille can also
be made to open like an ordinary door to give flexibility of
access to the filter for cleaning or replacement.

OPPOSED BLADES DAMPER

FLOWTECH OBD is fixed to the rear frame of SDR, DDR, FBR,
ECR, & PAR models by means of “S” clamp for ease of removal
and construction rigidity.
To adjust the OBD opening, turn the adjustment screw available
at the front face of the register (Clockwise to Open / Counter
Clockwise to Close).

C-4
 GRILLES & REGISTERS

MOUNTING OPTIONS

Concealed Type Fixing - Wall Only (CSF) Visible Screw Fixing - Wall or Ceiling (VSF)

Visible Screw Fixing with Brackets

ORDERING SYSTEM

AXB
RAL Code Color

Width in mm or inch

Length in mm or inch

V :Front Bar Vertical

H :Front Bar Horizontal

SDG :Single Deflection Grille

SDR :Single Deflection Register
DDG :Double Deflection Grille
DDR :Double Deflection Register
FBG :Fixed Blade Grille
FBR :Fixed Blade Register
FLG :Filter Grille
PAG :Perforated Air Grille
Ordering Example Notes: PAR :Perforated Air Register
ECG :Egg Crate Grille
DDR - V - 1200X200 - 9010 1. For SDG, SDR, DDG and DDR our standard ECR :Egg Crate Register
Stands for Double Deflection Register, with production is front bars horizontal unless DG :Door Grille
Vertical Blades in front, size 1200mm x 200mm specifically mentioned otherwise. DEG :Decorative Grille
DER :Decorative Register
and powder coated RAL 9010.
2. A register is a grille with opposed blade
ECG - 1200X150 - 9016 damper fixed on the back with S clamps.
Stands for Egg Crate Grille, size 1200mm x
150mm with powder coated RAL 9016. 3. Standard Powder Coated RAL Color RAL
9010 and RAL 9016.

C-5
 GRILLES & REGISTERS

GENERAL NOTES
Pages onwards give performance data for all models and variants, 5. NC and Pressure values shown, are based on a complete
and unless otherwise stated the following general notes apply: unit with an opposed blade in the fully open position for the
supply register and without damper for the return grille. The
1. Throws shown are to three terminal velocity of 0.25m/s,
damper should only be used for fine balancing, as for every
0.50m/s, 0.75m/s, (50fpm, 100fpm, 150fpm) with supply air at
doubling of pressure there is a resulting increase in the noise
conditions with max ∆T = 10k cooling.
level of +9dB for supply, or +5dB for exhaust.
2. For standard room height of 2.75 metres, throws should
be taken as the distance to the nearest wall (minimum plan 6. Models with reduced necks. There is a ‘dilution effect’ on
dimension, MPD). performance for these models, as the air tends to spread
behind the core, reducing throws by up to 20%, depending on
3. To avoid air flow ‘dumping’ on cooling cycles at the grille the relationship between the neck size and the base diffuser
core, it is advisable to ensure that the neck velocities do not size. For more information, please check with the factory.
drop below 0.75m/s (150fpm).
7. The following tables include the results of test conducted on
4. The acoustic data were tested in accordance to ASHRAE samples of air terminals. The test results include Noise Criteria
70-1991 standard. The octave band sound power levels ob- (NC), static pressure versus air flow, throw and effective area.
tained were plotted to determine the point of tangency with Extrapolation was used to obtain the performance for other
the highest rank Noise Criteria curve (NC) to establish the NC. sizes and other parameters within the range of products
Noise Criteria ratings were determined by subtracting room mentioned above.
absorption of 10dB from the sound power level data. Test method included in Report.

TEST REPORTS

Performance Test Certificate Performance Test Certificate

Issued To Issued To

FLOWTECH FLOWTECH
PO BOX 1871 PO BOX 1871
DUBAI, U.A.E. DUBAI, U.A.E.

Intertek has tested a representative sample of Intertek has tested representative samples of
Flowtech Double Deflection Return Air Grille Flowtech Double Deflection Supply Air Registers

A Double Deflection Return Air Grille Double Deflection Registers sizes 350 by 150 mm and 750 by 200 mm
was tested in accordance with the standards listed below and was found were tested in accordance with the standards listed below and were found
to perform in a manner appropriate to the dictates of the standards. to perform in a manner appropriate to the dictates of the standards.

STANDARDS STANDARDS

ASHRAE 70-1991 Standard “Method of Testing for Rating the Performance of Air Outlets and Inlets” ASHRAE 70-1991 Standard “Method of Testing for Rating the Performance of Air Outlets and Inlets”

ADC1062: GRD-84 “Test Code for Grilles, Registers and Diffusers” ADC1062: GRD-84 “Test Code for Grilles, Registers and Diffusers”

ISO 5219:1984 “Air distribution and air diffusion – ISO 5219:1984 “Air distribution and air diffusion –
Laboratory aerodynamic testing and rating of air terminal devices” Laboratory aerodynamic testing and rating of air terminal devices”

ISO 3741:1999 “Acoustics — Determination of sound power levels of noise sources ISO 3741:1999 “Acoustics — Determination of sound power levels of noise sources
using sound pressure — Precision methods for reverberation rooms” using sound pressure — Precision methods for reverberation rooms”

SCOPE OF TESTING SCOPE OF TESTING

The double deflection return air grille was tested for the following performance characteristics: The double deflection registers were tested for the following performance characteristics:
"Reference Intertek Report Number 3063712-005 dated September 15, 2004” "Reference Intertek Report Numbers 3063712-001 and 3063712-002 dated September 13, 2004”

A) Sound Power Level ((NC) A) Sound Power Level ((NC)

B) Air Volume versus Static Pressure B) Air Volume versus Static Pressure
C) Area Factor
Date: September 24, 2020 D) Throw Pattern

Date: September 23, 2020

James R. Kline
Intertek
Engineer / Quality Supervisor James R. Kline
Intertek
Engineer / Quality Supervisor
This Verification is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's
responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in
accordance with the agreement, for any loss, expense or damage occasioned by the use of this Verification. Only the Client is authorized to copy or
distribute this Verification. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service This Verification is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's
must first be approved in writing by Intertek. The observations and test results referenced from this Verification are relevant only to the sample tested. responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in
This Verification by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. accordance with the agreement, for any loss, expense or damage occasioned by the use of this Verification. Only the Client is authorized to copy or
distribute this Verification. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service
must first be approved in writing by Intertek. The observations and test results referenced from this Verification are relevant only to the sample tested.
This Verification by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program.

C-6
 GRILLES & REGISTERS

PERFORMANCE DATA - SI UNITS

Symbols Notes
L/sec : Air Volume in Litres per second. The large throw values are based on the minimum terminal
velocity of 0.25 m/sec.
Af : Effective free area in square meters.
The middle throw values are based on the medium terminal
Vf : Face Velocity in meters per second.
velocity of 0.50 m/sec.
Ak : Neck Area in square meters.
The small throw values are based on the maximum terminal
Vk : Neck Velocity in meters per second. velocity of 0.75 m/sec.
Ps : Static pressure in Pascal.
Conditions
Pv : Velocity pressure in Pascal.
• Supply or Return as indicated.
Pt : Total pressure in Pascal. • Noise Criteria values are based on (10dB) room attenuation.
Th : Throw in meters. • Damper is fully open.
NC : Noise Criteria. • Maximum room height = 4.0m
• Maximum Cooling @ ∆T = 10K

NOTES

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 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
300 X 150 400 x 150 500 x 150 600 x 150
Size 300 x 200 450 x 200 500 X 200
AIR FLOW (L/s)

(mm X mm) 300 x 250

300 x 300
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (m2) 0.041 0.055 0.062 0.069 0.083 0.093
Frea Area (m2) 0.021 0.017 0.028 0.024 0.032 0.027 0.036 0.030 0.049 0.041 0.057 0.048
Face Velocity m/s 4.8 5.9 3.6 4.2 3.1 3.7 2.8 3.3 2.0 2.4 1.8 2.1
Neck Velocity m/s 2.4 1.8 1.6 1.4 1.2 1.1
Ps (Pa) 10 18 5 9 4 7 2 3 1 2 1 1
100

Pt (Pa) 13 21 7 11 5 8 3 4 2 2 1 2
Throw (m) 3.5 4.8 7.0 1.9 4.0 6.4 3.3 3.9 6.0 1.7 2.6 4.2 3.0 3.6 5.7 1.4 2.4 3.9 2.7 3.3 5.5 1.2 2.1 3.7 2.5 3.2 5.3 1.1 2.0 3.5 2.5 3.1 5.3 1.0 1.9 3.4
NC <15 15 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15
Face Velocity m/s 6.0 7.4 4.5 5.2 3.9 4.6 3.5 4.2 2.6 3.0 2.2 2.6
Neck Velocity m/s 3.0 2.3 2.0 1.8 1.5 1.3
Ps (Pa) 15 27 8 14 6 10 3 5 2 3 1 2
125

Pt (Pa) 21 34 11 18 8 13 4 6 2 3 2 2
Throw (m) 3.9 5.0 6.9 2.3 3.7 5.0 3.9 4.7 6.9 2.2 3.2 5.1 3.9 4.4 6.6 2.1 3.3 4.8 3.5 4.2 6.4 2.0 3.1 4.6 3.3 4.0 6.4 1.9 3.1 4.5 3.3 4.1 6.4 1.9 3.0 4.4
NC <15 15 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15
Face Velocity m/s 7.1 8.8 5.4 6.3 4.7 5.6 4.2 5.0 3.1 3.7 2.6 3.1
Neck Velocity m/s 3.7 2.7 2.4 2.2 1.8 1.6
Ps (Pa) 22 40 11 20 8 15 5 9 2 4 2 3
150

Pt (Pa) 31 48 17 26 12 19 7 11 3 5 2 4
Throw (m) 4.4 5.4 7.5 2.8 4.1 5.4 4.3 5.1 7.4 2.5 3.8 5.5 4.6 5.1 7.2 2.5 3.8 5.2 3.9 4.9 7.0 2.3 3.6 5.1 3.8 4.8 6.9 2.2 3.5 4.9 3.7 4.7 6.8 2.2 3.4 4.8
NC 15 21 15 20 <15 18 <15 <15 <15 <15 <15 <15
Face Velocity m/s 8.3 10.3 6.3 7.3 5.5 6.5 4.9 5.8 3.6 4.3 3.1 3.6
Neck Velocity m/s 4.3 3.2 2.8 2.5 2.1 1.9
Ps (Pa) 30 54 15 28 11 20 9 16 3 5 2 4
175

Pt (Pa) 41 66 22 34 17 26 13 20 5 7 3 5
Throw (m) 4.7 6.0 8.2 3.3 4.4 5.9 4.6 5.8 8.0 3.0 4.1 5.8 4.4 5.6 7.9 3.0 4.1 5.5 4.4 5.6 7.7 2.8 4.0 5.5 4.3 5.5 7.6 2.7 3.9 5.4 4.2 5.4 7.6 2.7 3.9 5.3
NC 18 23 26 22 21 21 18 20 <15 18 <15 15
Face Velocity m/s 9.5 11.8 7.1 8.3 6.3 7.4 5.6 6.7 4.1 4.9 3.5 4.2
Neck Velocity m/s 4.9 3.6 3.2 2.9 2.4 2.2
Ps (Pa) 39 71 20 36 15 27 12 21 5 9 2 3
200

Pt (Pa) 53 85 28 44 21 33 17 26 7 11 3 4
Throw (m) 5.0 6.2 8.6 3.8 4.9 6.4 5.0 6.2 8.6 3.5 4.6 6.2 4.7 5.9 8.3 3.5 4.6 6.1 4.7 5.9 8.2 3.2 4.4 5.9 4.5 5.7 8.2 3.0 4.3 5.8 4.5 5.7 8.1 3.0 4.3 5.8
NC 27 29 26 28 25 27 22 25 <15 18 <15 15
Face Velocity m/s - - 8.0 9.4 7.0 8.3 6.3 7.5 4.6 5.5 3.9 4.7
Neck Velocity m/s - 4.1 3.6 3.3 2.7 2.4
Ps (Pa) - - 25 46 19 34 15 27 7 12 2 3
225

Pt (Pa) - - 35 55 27 42 21 33 11 16 3 4
Throw (m) - - - - - - 5.4 6.6 9.1 3.9 5.1 6.6 5.2 6.4 9.0 3.9 5.1 6.4 5.1 6.3 8.8 3.7 4.4 6.1 4.8 6.1 8.8 3.4 4.8 6.3 4.7 6.1 8.7 3.4 4.5 6.1
NC - - 34 40 29 35 26 32 <15 <15 <15 <15
Face Velocity m/s - - 8.9 10.4 7.8 9.3 6.9 8.3 5.1 6.1 4.4 5.2
Neck Velocity m/s - 4.5 4.0 3.6 3.0 2.7
Ps (Pa) - - 31 56 23 42 18 33 9 15 5 8
250

Pt (Pa) - - 44 68 32 51 26 41 14 21 8 12
Throw (m) - - - - - - 5.7 6.9 9.8 4.2 5.4 7.1 5.7 6.9 9.6 4.2 5.4 6.8 5.4 6.6 9.5 4.2 4.8 6.5 5.1 6.6 9.3 3.9 5.1 6.6 5.0 6.4 9.1 3.9 4.9 6.5
NC - - 37 43 32 39 29 35 18 24 <15 <15
Face Velocity m/s - - 9.8 11.5 8.6 10.2 7.6 9.2 5.6 6.7 4.8 5.7
Neck Velocity m/s - 5.0 4.4 4.0 3.3 3.0
Ps (Pa) - - 38 69 29 50 22 40 10 19 7 13
275

Pt (Pa) - - 53 83 42 63 31 49 17 26 12 18
Throw (m) - - - - - - 6.0 7.2 10.3 4.5 5.7 7.5 6.0 7.2 10 4.5 5.5 7.2 5.7 6.9 10 4.5 5.4 6.9 5.6 6.9 9.7 4.2 5.4 6.9 5.4 6.6 9.6 4.2 5.4 6.9
NC - - 40 46 35 41 32 38 21 27 <15 <15

See notes on page C-7 Contd...

C-8
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
750 X 150 900 X 150
Size 600 X 200 750 x 200
AIR FLOW (L/s)

(mm X mm) 450 X 250 500 X 250 600 x 250

450 X 300 500 x 300
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (m2) 0.104 0.112 0.118 0.125 0.141
Frea Area (m2) 0.067 0.056 0.073 0.061 0.077 0.065 0.085 0.071 0.097 0.081
Face Velocity m/s 1.5 1.8 1.4 1.6 - - - - - -
Neck Velocity m/s 1.0 0.9 - - -
Ps (Pa) 0 1 0 1 - - - - - -
100

Pt (Pa) 1 1 1 1 - - - - - -
Throw (m) 2.3 2.9 5.1 0.9 1.8 3.2 2.2 2.9 5.0 0.8 1.7 3.2 - - - - - - - - - - - - - - - - - -
NC <15 <15 <15 <15 - - - - - -
Face Velocity m/s 1.9 2.2 1.7 2.0 1.6 1.9 - - - -
Neck Velocity m/s 1.2 1.1 1.1 - -
Ps (Pa) 1 1 1 1 1 1 - - - -
125

Pt (Pa) 1 2 1 1 1 1 - - - -
Throw (m) 3.0 3.9 6.3 1.7 2.9 4.3 3.1 3.9 6.2 1.6 2.9 4.2 3.0 3.8 6.2 1.6 2.8 1.3 - - - - - - - - - - - -
NC <15 <15 <15 <15 <15 <15 - - - -
Face Velocity m/s 2.2 2.7 2.1 2.5 1.9 2.3 - - - -
Neck Velocity m/s 1.4 1.3 1.3 - -
Ps (Pa) 1 2 1 2 1 1 - - - -
150

Pt (Pa) 2 2 1 2 1 2 - - - -
Throw (m) 3.6 4.6 6.7 2.1 3.3 4.7 3.6 4.6 6.6 2.6 3.8 5.5 3.0 4.0 5.8 2.0 3.2 4.6 - - - - - - - - - - - -
NC <15 <15 <15 <15 <15 <15 - - - -
Face Velocity m/s 2.6 3.1 2.4 2.9 2.3 2.7 - - - -
Neck Velocity m/s 1.7 1.6 1.5 - -
Ps (Pa) 1 3 1 2 1 2 - - - -
175

Pt (Pa) 2 5 2 3 2 3 - - - -
Throw (m) 4.5 5.4 7.5 2.6 3.8 5.2 4.1 5.3 7.5 3.5 4.7 6.6 3.2 4.5 6.1 2.6 3.8 5.1 - - - - - - - - - - - -
NC <15 <15 <15 <15 <15 <15 - - - -
Face Velocity m/s 3.0 3.6 2.7 3.3 2.6 3.1 - - - -
Neck Velocity m/s 1.9 1.8 1.7 - -
Ps (Pa) 1 2 1 2 1 1 - - - -
200

Pt (Pa) 2 5 1 2 1 2 - - - -
Throw (m) 4.4 5.6 7.9 2.8 4.2 5.7 4.4 5.6 8.0 2.8 4.1 5.6 4.3 5.5 8.0 2.8 4.1 5.6 - - - - - - - - - - - -
NC <15 <15 <15 <15 <15 <15 - - - -
Face Velocity m/s 3.4 4.0 3.1 3.7 2.9 3.5 2.6 3.2 - -
Neck Velocity m/s 2.2 2.0 1.9 1.8 -
Ps (Pa) 1 2 1 1 1 1 0.4 0.7 - -
225

Pt (Pa) 2 3 1 2 1 2 0.9 1.2 - -

Throw (m) 4.6 7.4 5.6 3.3 4.4 6.0 4.5 5.9 8.6 3.3 4.4 5.9 4.4 5.9 8.6 3.2 4.3 5.9 4.3 5.8 8.5 3.2 4.2 5.9 - - - - - -
NC <15 <15 <15 <15 <15 <15 <15 <15 - -
Face Velocity m/s 3.7 4.5 3.4 4.1 3.2 3.8 2.9 3.5 2.6 3.1
Neck Velocity m/s 2.4 2.2 2.1 2.0 1.8
Ps (Pa) 1 1 0 1 0 1 0 0 0 0
250

Pt (Pa) 2 2 1 2 1 1 1 1 0 0
Throw (m) 4.8 7.4 6.8 3.8 4.8 6.2 4.7 6.2 9 3.8 4.8 6.2 4.7 6.2 9.0 3.7 4.7 6.2 4.6 6.1 8.9 6.3 4.7 6.2 4.4 6.0 8.8 3.7 4.6 6.1
NC <15 <15 <15 <15 <15 <15 <15 <15 <15 <15
Face Velocity m/s 4.1 4.9 3.8 4.5 3.6 4.2 3.2 3.9 2.8 3.4
Neck Velocity m/s 2.6 2.5 2.3 2.2 2.0
Ps (Pa) 4 6 0 0 0 0 0.1 0.2 0.1 0.1
275

Pt (Pa) 7 10 1 1 0 0 0.2 0.3 0.1 0.1

Throw (m) 5.3 6.6 9.4 4.2 5.2 6.8 5.2 6.5 9.3 4.1 5.2 6.7 5.2 6.5 9.3 4.1 5.2 6.7 5.1 6.4 9.2 5.6 5.2 6.6 5.0 6.3 9.1 4.0 5.1 6.5
NC <15 <15 <15 <15 <15 <15 <15 <15 <15 <15

See notes on page C-7 Contd...

C-9
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
1050 X 150 1050 X 200
Size 900 X 200
AIR FLOW (L/s)

(mm X mm) 750 X 250 900 X 250

600 X 300 750 X 300
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (m2) 0.146 0.169 0.178 0.198 0.214
Frea Area (m2) 0.103 0.087 0.121 0.102 0.134 0.112 0.156 0.131 0.182 0.153
Face Velocity m/s - - - - - - - - - -
Neck Velocity m/s - - - - - - - - - -
Ps (Pa) - - - - - - - - - -
100

Pt (Pa) - - - - - - - - - -
Throw (m) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity m/s - - - - - - - - - -
Neck Velocity m/s - - - - - - - - - -
Ps (Pa) - - - - - - - - - -
125

Pt (Pa) - - - - - - - - - -
Throw (m) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity m/s - - - - - - - - - -
Neck Velocity m/s - - - - - - - - - -
Ps (Pa) - - - - - - - - - -
150

Pt (Pa) - - - - - - - - - -
Throw (m) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity m/s - - - - - - - - - -
Neck Velocity m/s - - - - - - - - - -
Ps (Pa) - - - - - - - - - -
175

Pt (Pa) - - - - - - - - - -
Throw (m) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity m/s - - - - - - - - - -
Neck Velocity m/s - - - - - - - - - -
Ps (Pa) - - - - - - - - - -
200

Pt (Pa) - - - - - - - - - -
Throw (m) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity m/s - - - - - - - - - -
Neck Velocity m/s - - - - - - - - - -
Ps (Pa) - - - - - - - - - -
225

Pt (Pa) - - - - - - - - - -
Throw (m) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity m/s - - - - - - - - - -
Neck Velocity m/s - - - - - - - - - -
Ps (Pa) - - - - - - - - - -
250

Pt (Pa) - - - - - - - - - -
Throw (m) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity m/s 2.7 3.2 2.3 2.7 - - - - - -
Neck Velocity m/s 1.9 1.6 - - - - - -
Ps (Pa) 0.0 0.1 7.6 0.0 - - - - - -
275

Pt (Pa) 0.1 0.1 0.0 0.0 - - - - - -

Throw (m) 5.0 6.3 9.1 4.0 5.1 6.5 4.8 6.1 8.9 3.9 5.0 6.3 - - - - - -
NC <15 <15 <15 <15 - - - - - -

See notes on page C-7 Contd...

C-10
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
400 x 150 500 x 150 600 x 150 750 X 150
Size 450 x 200 500 X 200
AIR FLOW (L/s)

(mm X mm) 300 x 250 450 X 250

300 x 300
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (m2) 0.062 0.069 0.083 0.093 0.104
Frea Area (m2) 0.032 0.027 0.036 0.030 0.049 0.041 0.057 0.048 0.067 0.056
Face Velocity m/s 9.4 11.1 8.3 10.0 6.1 7.3 5.3 6.3 4.5 5.4
Neck Velocity m/s 4.8 4.3 3.6 3.2 2.9
Ps (Pa) 35 60 26 47 12 22 9 15 6 11
300

Pt (Pa) 49 74 38 59 21 31 15 22 11 16
Throw (m) 6.2 7.4 10.2 4.7 5.7 7.4 5.4 4.1 10.1 4.7 5.6 7.1 5.9 7.1 9.9 4.4 5.6 7.1 5.5 6.8 9.9 4.4 5.6 7.1 5.6 6.8 9.5 4.4 5.4 7.1
NC 38 44 35 41 23 30 17 24 <15 18
Face Velocity m/s - - 9.7 11.7 7.1 8.5 6.1 7.3 5.2 6.3
Neck Velocity m/s - 5.1 4.2 3.8 3.4
Ps (Pa) - - 36 65 17 30 12 21 8 14
350

Pt (Pa) - - 50 79 28 42 20 30 14 21
Throw (m) - - - - - - 5.4 7.4 10.4 5.0 5.9 7.6 6.2 7.5 10.4 4.9 5.9 7.4 5.8 7.1 10.2 4.7 5.9 7.4 5.9 7.1 9.8 4.7 5.6 7.3
NC - - 40 46 28 35 22 29 <15 23
Face Velocity m/s - - - - 8.2 9.8 7.0 8.3 6.0 7.1
Neck Velocity m/s - - 4.8 4.3 3.8
Ps (Pa) - - - - 22 39 15 27 11 19
400

Pt (Pa) - - - - 36 54 27 39 20 28
Throw (m) - - - - - - - - - - - - 6.7 7.9 11.1 5.3 6.4 7.9 6.5 7.7 10.8 5.0 6.2 7.7 6.4 7.6 10.6 5.0 5.9 7.6
NC - - - - 32 39 26 33 20 27
Face Velocity m/s - - - - 9.2 11.0 7.9 9.4 6.7 8.0
Neck Velocity m/s - - 5.4 4.8 4.3
Ps (Pa) - - - - 27 50 19 35 13 24
450

Pt (Pa) - - - - 45 67 34 49 25 36
Throw (m) - - - - - - - - - - - - 7.3 8.7 12.1 5.7 6.9 8.4 7.3 8.7 11.8 5.5 6.6 8.1 7.0 8.4 11.6 5.4 6.3 8.1
NC - - - - 36 43 30 37 24 31
Face Velocity m/s - - - - 10.2 12.2 8.8 10.4 7.5 8.9
Neck Velocity m/s - - 6.0 5.4 4.8
Ps (Pa) - - - - 34 62 24 43 16 30
500

Pt (Pa) - - - - 55 82 41 60 30 44
Throw (m) - - - - - - - - - - - - 7.8 9.8 12.9 6.0 7.2 8.7 7.8 9.5 12.6 6.0 6.9 8.4 7.6 9.1 12.3 5.6 6.6 8.3
NC - - - - 39 46 33 40 28 34
Face Velocity m/s - - - - - - 10.5 12.5 9.0 10.7
Neck Velocity m/s - - - 6.5 5.8
Ps (Pa) - - - - - - 33 62 24 43
600

Pt (Pa) - - - - - - 56 86 41 61
Throw (m) - - - - - - - - - - - - - - - - - - 8.8 10.7 14.5 6.6 7.5 9.1 8.6 10.3 13.8 6.0 7.2 8.7
NC - - - - - - 38 46 33 40
Face Velocity m/s - - - - - - - - 10.4 12.5
Neck Velocity m/s - - - - 6.7
Ps (Pa) - - - - - - - - 32 58
700

Pt (Pa) - - - - - - - - 56 83
Throw (m) - - - - - - - - - - - - - - - - - - - - - - - - 9.6 11.5 15.1 6.5 7.8 9.4
NC - - - - - - - - 38 45
Face Velocity m/s - - - - - - - - - -
Neck Velocity m/s - - - - -
Ps (Pa) - - - - - - - - - -
800

Pt (Pa) - - - - - - - - - -
Throw (m) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
NC - - - - - - - - - -

See notes on page C-7 Contd...

C-11
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
900 X 150 1050 X 150
Size 600 X 200 750 x 200
AIR FLOW (L/s)

(mm X mm) 500 X 250 600 x 250

450 X 300 500 x 300
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (m2) 0.112 0.118 0.125 0.141 0.146
Frea Area (m2) 0.073 0.061 0.077 0.065 0.085 0.071 0.097 0.081 0.103 0.087
Face Velocity m/s 4.1 4.9 3.9 4.6 3.5 4.2 3.1 3.7 2.9 3.4
Neck Velocity m/s 2.7 2.5 2.4 2.1 2.1
Ps (Pa) 2 4 2 4 0 7 0 0 0 0
300

Pt (Pa) 4 6 4 6 1 1 1 1 1 1
Throw (m) 5.4 6.6 9.5 4.3 5.4 6.9 5.4 6.5 9.4 4.3 5.4 6.9 5.3 6.5 9.3 4.3 5.3 6.8 5.2 6.4 9.2 4.1 5.2 6.8 5.2 6.4 9.2 4.2 5.2 6.7
NC <15 <15 <15 <15 <15 <15 <15 <15 <15 <15
Face Velocity m/s 4.8 5.7 4.5 5.4 4.1 4.9 3.6 4.3 3.4 4.0
Neck Velocity m/s 3.1 3.0 2.8 2.5 2.4
Ps (Pa) 7 12 6 11 3 16 1 1 1 1
350

Pt (Pa) 12 17 11 16 6 8 2 3 2 2
Throw (m) 5.6 7.0 9.8 4.7 5.6 7.1 5.6 6.7 9.5 4.7 5.6 7.1 5.4 6.6 9.4 4.5 5.6 7.0 5.3 6.5 9.3 4.5 5.4 6.9 5.3 6.5 9.3 4.5 5.4 6.9
NC <15 19 <15 17 <15 <15 <15 <15 <15 <15
Face Velocity m/s 5.5 6.6 5.2 6.2 4.7 5.6 4.1 4.9 3.9 4.6
Neck Velocity m/s 3.6 3.4 3.2 2.8 2.7
Ps (Pa) 9 15 8 14 6 11 3 5 3 5
400

Pt (Pa) 15 22 14 20 11 16 6 8 6 8
Throw (m) 6.1 7.4 10.5 5.0 5.9 7.4 6.1 7.1 10.3 5.0 5.9 7.4 5.8 7.0 10 4.7 5.9 7.3 5.8 6.8 10 4.7 5.8 7.1 5.6 6.8 10 4.6 5.7 7.1
NC 17 20 <15 <15 <15 <15 <15 <15 <15 <15
Face Velocity m/s 6.2 7.4 5.8 6.9 5.3 6.3 4.6 5.6 4.4 5.2
Neck Velocity m/s 4.0 3.8 3.6 3.2 3.1
Ps (Pa) 11 20 10 17 8 14 9 10 5 9
450

Pt (Pa) 20 29 19 27 14 19 11 15 10 14
Throw (m) 6.7 8.1 11.3 5.4 6.3 7.8 6.7 7.8 11.3 5.2 6.3 7.8 6.4 7.8 11 5.1 6.3 7.8 6.4 7.5 11 5.1 6.3 7.6 6.1 7.5 10.9 4.9 6.0 7.5
NC 21 23 22 <15 18 <15 <15 <15 <15 <15
Face Velocity m/s 6.9 8.2 6.5 7.7 5.9 7.0 5.2 6.2 4.9 5.7
Neck Velocity m/s 4.5 4.2 4.0 3.5 3.4
Ps (Pa) 13 24 12 22 10 17 7 12 6 11
500

Pt (Pa) 25 36 23 33 18 24 14 19 12 17
Throw (m) 7.3 8.8 12 5.6 6.6 8.0 7.3 8.5 11.9 5.3 6.6 8.0 7.0 8.5 11.6 5.3 6.5 8.0 7.0 8.2 11.6 5.3 6.5 8.0 6.7 8.2 11.3 5.3 6.2 7.7
NC 24 28 22 29 19 25 <15 20 <15 18
Face Velocity m/s 8.2 9.8 7.8 9.2 7.1 8.5 6.2 7.4 5.8 6.9
Neck Velocity m/s 5.4 5.1 4.8 4.3 4.1
Ps (Pa) 19 35 17 31 14 25 10 18 9 16
600

Pt (Pa) 37 53 32 46 26 37 21 29 18 25
Throw (m) 8.3 10 13.6 6.0 7.2 8.5 8.3 9.7 13 5.7 7.2 8.4 8.0 9.6 12.6 5.7 6.9 8.3 8.0 9.3 12.6 5.6 6.8 8.3 7.7 9.3 12.3 5.6 6.6 8.0
NC 30 30 28 35 25 31 20 26 17 23
Face Velocity m/s 9.6 11.5 9.1 10.8 8.2 9.9 7.2 8.6 6.8 8.1
Neck Velocity m/s 6.3 5.9 5.6 5.0 4.8
Ps (Pa) 26 48 23 42 19 34 14 24 12 21
700

Pt (Pa) 49 71 45 64 38 53 36 38 26 35
Throw (m) 9.4 11.4 15.1 6.5 7.8 9.2 9.2 11.1 14.5 6.3 7.7 8.9 9.0 10.9 14.1 6.3 7.5 8.7 9.0 10.7 14.2 6.0 7.2 8.6 8.7 10.6 13.8 6.0 7.2 8.4
NC 35 42 33 40 30 36 25 31 22 28
Face Velocity m/s 11.0 13.1 10.4 12.3 9.4 11.3 8.2 9.9 7.8 9.2
Neck Velocity m/s 7.1 6.8 6.4 5.7 5.5
Ps (Pa) 34 62 30 55 25 44 18 32 15 28
800

Pt (Pa) 63 91 59 84 49 69 47 50 34 46
Throw (m) 10.1 12.3 16.0 7.0 8.9 9.7 9.7 12.2 15.7 7.0 8.0 9.2 9.7 12 15.7 7.0 8.0 9.2 9.7 11.9 15.5 6.7 7.9 9.1 9.4 11.6 15.3 6.5 7.9 8.9
NC 39 46 37 44 34 40 29 35 26 33

See notes on page C-7 Contd...

C-12
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
1050 X 200
Size 900 X 200
AIR FLOW (L/s)

(mm X mm) 750 X 250 900 X 250 1050

600 X 300 750 X 300 900 X 300 1050 X 300
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (m2) 0.169 0.178 0.198 0.214 0.258 0.302
Frea Area (m2) 0.121 0.102 0.134 0.112 0.156 0.131 0.182 0.153 0.228 0.192 0.272 0.228
Face Velocity m/s 2.5 2.9 - - - - - - - - - -
Neck Velocity m/s 1.8 - - - - -
Ps (Pa) 0 0 - - - - - - - - - -
300

Pt (Pa) 0 0 - - - - - - - - - -
Throw (m) 5.0 6.2 9.0 4.1 5.1 6.6 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
NC <15 <15 - - - - - - - - - -
Face Velocity m/s 2.9 3.4 2.6 3.1 2.2 2.7 - - - - - -
Neck Velocity m/s 2.1 2.0 1.8 - - -
Ps (Pa) 0 1 0 0 0 0 - - - - - -
350

Pt (Pa) 1 1 1 1 1 1 - - - - - -
Throw (m) 5.1 6.3 9.0 4.3 5.3 6.8 5.0 6.2 9.0 4.3 5.3 6.7 4.9 6.1 8.8 4.2 5.2 6.7 - - - - - - - - - - - - - - - - - -
NC <15 <15 <15 <15 <15 <15 - - - - - -
Face Velocity m/s 3.3 3.9 3.0 3.6 2.6 3.1 2.2 2.6 1.8 2.1 - -
Neck Velocity m/s 2.4 2.2 2.0 1.9 1.6 -
Ps (Pa) 1 1 0 1 0 1 0 0 0 0 - -
400

Pt (Pa) 1 2 1 2 1 1 1 1 0 0 - -
Throw (m) 5.4 6.5 9.6 4.5 6.2 6.9 5.3 6.5 9.6 4.4 5.6 6.8 5.1 6.3 9.4 4.3 5.4 6.7 5.0 6.2 8.1 4.3 5.4 6.1 5.0 6.1 9.1 4.2 5.4 6.5 - - - - - -
NC <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 - -
Face Velocity m/s 3.7 4.4 3.4 4.0 2.9 3.4 2.5 2.9 2.0 2.3 - -
Neck Velocity m/s 2.7 2.5 2.3 2.1 1.7 -
Ps (Pa) 2 4 0 1 2 0 0 0 0 0 - -
450

Pt (Pa) 6 7 1 2 1 1 1 1 0 1 - -
Throw (m) 5.9 7.1 10.6 4.8 6.4 7.2 5.8 7.0 10.5 4.7 5.8 7.2 5.6 6.8 10.3 4.6 5.6 7.1 5.5 6.6 10.1 4.5 5.6 6.9 5.4 6.5 10.0 4.5 5.5 6.9 - - - - - -
NC <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 - -
Face Velocity m/s 4.1 4.9 3.7 4.5 3.2 3.8 2.7 3.3 2.2 2.6 1.8 2.2
Neck Velocity m/s 3.0 2.8 2.5 2.3 1.9 1.7
Ps (Pa) 4 8 2 3 3 2 0 0 0 0 0 0
500

Pt (Pa) 9 13 4 5 3 4 1 1 0 1 0 0
Throw (m) 6.5 7.9 11.0 5.0 5.9 7.4 6.4 7.7 10.9 5.0 6.0 7.4 6.2 7.5 10.7 4.8 5.8 7.2 6.0 7.2 10.4 4.8 5.7 7.1 5.9 7.1 10.2 4.7 5.6 7.0 5.5 6.5 9.6 4.4 5.2 6.6
NC <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15
Face Velocity m/s 5.0 5.9 4.5 5.4 3.8 4.6 3.3 3.9 2.6 3.1 2.2 2.6
Neck Velocity m/s 3.6 3.4 3.0 2.8 2.3 2.0
Ps (Pa) 30 11 5 10 4 7 2 3 0 0 0 0
600

Pt (Pa) 12 17 12 16 9 13 4 5 1 1 0 0
Throw (m) 7.6 9.0 12.1 5.4 6.3 7.7 7.4 9.0 12.0 5.3 6.3 7.5 7.3 8.6 11.7 5.2 6.2 7.4 7.2 8.4 11.5 5.0 5.9 7.3 7.0 8.1 11.1 4.9 5.8 7.0 6.6 7.5 10.4 4.5 5.4 6.6
NC <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15
Face Velocity m/s 5.8 6.9 5.2 6.3 4.5 5.3 3.8 4.6 3.1 3.6 2.6 3.1
Neck Velocity m/s 4.1 3.9 3.5 3.3 2.7 2.3
Ps (Pa) 47 15 7 13 6 10 5 8 0 0 0 0
700

Pt (Pa) 17 24 16 22 12 16 11 15 1 1 0 0
Throw (m) 8.4 10.3 13.7 5.9 6.9 8.1 8.4 10.3 13.4 5.7 6.9 8.1 8.1 9.9 13.2 5.4 6.6 7.8 8.1 9.9 13.1 5.4 6.5 7.8 7.9 9.6 12.7 5.3 6.4 7.6 7.4 9.0 12.0 4.9 5.9 7.1
NC <15 22 <15 21 <15 <15 <15 <15 <15 <15 <15 <15
Face Velocity m/s 6.6 7.8 6.0 7.1 5.1 6.1 4.4 5.2 3.5 4.2 2.9 3.5
Neck Velocity m/s 4.7 4.5 4.0 3.7 3.1 2.7
Ps (Pa) 11 20 9 17 7 13 6 11 2 4 1 0
800

Pt (Pa) 24 33 21 29 16 22 15 20 5 7 0 0
Throw (m) 9.3 11.4 15.0 6.7 7.6 8.8 8.7 11.4 14.9 6.2 7.4 8.8 8.9 11.1 14.7 6.1 7.1 8.5 8.8 11.1 14.6 7.0 7.1 8.3 8.7 10.9 14.4 5.7 7.0 8.1 8.3 10.4 13.8 5.6 6.6 7.7
NC 20 27 18 25 <15 20 <15 <15 <15 <15 <15 <15

See notes on page C-7 Contd...

C-13
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
900 X 150 1050 X 150
Size 750 x 200 900 X 200
AIR FLOW (L/s)

(mm X mm) 500 X 250 600 x 250

450 X 300 500 x 300 600 X 300
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (m2) 0.118 0.125 0.141 0.146 0.169
Frea Area (m2) 0.077 0.065 0.085 0.071 0.097 0.081 0.103 0.087 0.121 0.102
Face Velocity m/s 11.7 13.8 10.6 12.7 9.3 11.1 8.7 10.3 7.4 8.8
Neck Velocity m/s 7.6 7.2 6.4 6.2 5.3
Ps (Pa) 38 69 31 56 22 40 19 35 14 25
900

Pt (Pa) 74 105 60 85 51 64 42 57 31 42
Throw (m) 10.4 13.1 16.7 7.6 8.5 9.8 10.4 13.0 16.7 7.6 8.5 9.8 10.4 12.5 16.3 7.3 8.4 9.6 10.1 12.4 16.3 7.3 8.4 9.3 10.1 12.2 16.0 7.0 8.1 9.3
NC 41 48 38 44 33 39 30 37 24 31
Face Velocity m/s - - 11.8 14.1 10.3 12.3 9.7 11.5 8.3 9.8
Neck Velocity m/s - 8.0 7.1 6.9 5.9
Ps (Pa) - - 38 69 25 50 24 44 16 31
1000

Pt (Pa) - - 73 105 61 74 52 70 37 51
Throw (m) - - - - - - 10.9 13.7 17.3 7.4 9.1 10.5 10.9 13.2 17.2 7.9 8.9 10.2 10.6 13.2 17.1 7.9 8.7 9.7 10.6 12.9 16.8 7.5 8.5 9.7
NC - - 41 47 36 42 34 40 28 34
Face Velocity m/s - - - - - - 11.7 13.8 9.9 11.8
Neck Velocity m/s - - - 8.2 7.1
Ps (Pa) - - - - - - 35 63 22 44
1200

Pt (Pa) - - - - - - 78 92 50 72
Throw (m) - - - - - - - - - - - - - - - - - - 11.2 14.3 17.9 8.5 9.6 10.9 11.2 14.0 17.6 8.2 9.6 10.7
NC - - - - - - 39 46 33 40
Face Velocity m/s - - - - - - - - 11.6 13.7
Neck Velocity m/s - - - - 8.3
Ps (Pa) - - - - - - - - 33 60
1400

Pt (Pa) - - - - - - - - 70 97
Throw (m) - - - - - - - - - - - - - - - - - - - - - - - - 11.8 15.0 18.4 9.2 10.6 11.7
NC - - - - - - - - 38 45
Face Velocity m/s - - - - - - - - - -
Neck Velocity m/s - - - - -
Ps (Pa) - - - - - - - - - -
1600

Pt (Pa) - - - - - - - - - -
Throw (m) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
NC - - - - - - - - - -

See notes on page C-7 Contd...

C-14
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
1050 X 200
Size
AIR FLOW (L/s)

(mm X mm) 750 X 250 900 X 250 1050

750 X 300 900 X 300 1050 X 300
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (m2) 0.178 0.198 0.214 0.258 0.302
Frea Area (m2) 0.134 0.112 0.156 0.131 0.182 0.153 0.228 0.192 0.272 0.228
Face Velocity m/s 6.7 8.0 5.8 6.9 4.9 5.9 3.9 4.7 3.3 3.9
Neck Velocity m/s 5.1 4.5 4.2 3.5 3.0
Ps (Pa) 12 22 9 16 8 14 5 9 2 4
900

Pt (Pa) 27 36 21 28 23 26 12 16 5 7
Throw (m) 9.4 12.2 16.0 6.7 7.9 9.3 9.8 12.1 15.9 6.7 7.6 9.0 9.5 11.9 15.7 7.5 7.6 8.7 9.5 11.8 15.4 6.1 7.6 7.3 9.3 11.4 15.0 6.0 7.1 8.1
NC 22 29 17 24 <15 21 <15 <15 <15 <15
Face Velocity m/s 7.5 8.9 6.4 7.6 5.5 6.5 4.4 5.2 3.7 4.4
Neck Velocity m/s 5.6 5.1 4.7 3.9 3.3
Ps (Pa) 16 27 12 20 9 17 6 11 4 8
1000

Pt (Pa) 33 45 27 35 23 31 15 20 10 14
Throw (m) 103 12.9 16.8 7.2 8.4 9.6 10.1 12.9 16.8 7.2 8.1 9.4 10.0 12.6 16.5 6.9 8.1 9.1 10.0 12.5 16.2 6.7 7.9 7.4 10.0 12.2 15.9 6.4 7.6 8.6
NC 26 32 21 27 18 24 <15 <15 <15 <15
Face Velocity m/s 9.0 10.7 7.7 9.2 6.6 7.8 5.3 6.3 4.4 5.3
Neck Velocity m/s 6.7 6.1 5.6 4.7 4.0
Ps (Pa) 22 39 18 29 14 25 9 16 6 11
1200

Pt (Pa) 40 66 39 50 31 42 21 29 15 20
Throw (m) 11.0 14.0 17.6 7.9 9.2 10.4 10.7 13.9 17.6 7.8 8.9 10.4 10.7 13.6 17.3 7.6 8.7 10.2 10.7 13.4 17.3 7.5 8.5 9.9 10.7 13.1 17.0 7.2 8.4 9.9
NC 31 38 26 32 23 30 <15 22 <15 <15
Face Velocity m/s 10.4 12.5 9.0 10.7 7.7 9.2 6.1 7.3 5.1 6.1
Neck Velocity m/s 7.9 7.1 6.5 5.4 4.6
Ps (Pa) 29 53 27 40 18 33 12 22 8 15
1400

Pt (Pa) 50 89 49 68 55 58 30 40 21 28
Throw (m) 11.8 15.0 18.4 8.7 10.2 11.4 11.8 14.7 18.2 8.6 9.9 11.4 11.5 14.4 17.9 8.6 9.6 11.2 11.5 14.4 17.9 8.3 9.5 11.1 11.4 14.1 17.6 8.0 9.2 10.9
NC 36 43 35 37 28 35 21 27 <15 20
Face Velocity m/s 11.9 14.3 10.3 12.2 8.8 10.5 7.0 8.3 5.9 7.0
Neck Velocity m/s 9.0 8.1 7.5 6.2 5.3
Ps (Pa) 38 69 29 52 24 44 16 28 11 20
1600

Pt (Pa) 71 115 64 90 73 76 39 52 28 37
Throw (m) 12.5 16.0 19.3 9.6 11.1 12.3 12.2 15.7 19.0 9.6 10.8 12.2 12.2 15.3 18.7 9.4 10.5 12.0 12.2 15.2 18.6 9.1 10.5 11.9 11.9 15.0 18.3 8.9 10.2 11.7
NC 40 47 40 42 32 39 25 31 19 24

See notes on page C-7

C-15
C-16
RETURN AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
300 x 150 450 X 150 500 X 150 600 X 150 750 X 150 900 X 150 1050 X 150
300 X 200 450 X 200 500 X 200 600 X 200 750 X 200 900 X 200 1050 X 200
AIR FLOW Size (mm x mm)
300 X 260 450 X 250 500 X 250 600 X 250 750 X 250 900 X 250 1050 X 250
(L/s)
300 X 300 500 X 300 600 X 300 750 X 300 900 X 300 1050 X 300
Neck Area (m2­) 0.041 0.055 0.062 0.069 0.083 0.093 0.104 0.112 0.118 0.125 0.141 0.146 0.170 0.178 0.198 0.214 0.258 0.302
Neck Velocity (m/s) 2.439 1.818 1.613 1.449 1.205 - - - - - - - - - - - - -
Pv (Pa) 4 2 2 1 1 - - - - - - - - - - - - -
100
Ps (Pa) 9 6 6 5 4 - - - - - - - - - - - - -
NC <15 <15 <15 <15 <15 - - - - - - - - - - - - -
Neck Velocity (m/s) 3.049 2.273 2.016 1.812 1.506 1.344 - - - - - - - - - - - -
Pv (Pa) 6 3 2 2 1 1 - - - - - - - - - - - -
125
Ps (Pa) 12 9 7 6 5 5 - - - - - - - - - - - -
NC <15 <15 <15 <15 <15 <15 - - - - - - - - - - - -
Neck Velocity (m/s) 3.659 2.727 2.419 2.174 1.807 1.613 1.442 1.339 - - - - - - - - - -
Pv (Pa) 9 5 3 3 2 2 1 1 - - - - - - - - - -
150
Ps (Pa) 18 11 9 8 6 5 4 4 - - - - - - - - - -
NC 18 <15 <15 <15 <15 <15 <15 <15 - - - - - - - - - -
Neck Velocity (m/s) 4.268 3.182 2.823 2.536 2.108 1.882 1.683 1.563 1.483 1.400 - - - - - - - -
Pv (Pa) 12 6 5 4 3 2 2 1 1 1 - - - - - - - -
175
Ps (Pa) 23 15 11 11 8 6 5 5 4 4 - - - - - - - -
NC 25 17 <15 <15 <15 <15 <15 <15 <15 <15 - - - - - - - -
Neck Velocity (m/s) 4.878 3.636 3.226 2.899 2.410 2.151 1.923 1.786 1.695 1.60 1.418 1.370 - - - - - -
Pv (Pa) 16 8 7 5 3 3 2 2 2 1 1 1 - - - - - -
200
Ps (Pa) 30 21 12 11 7 6 5 4 4 3 2 2 - - - - - -
NC 28 20 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 - - - - - -
Neck Velocity (m/s) 5.488 4.091 3.629 3.261 2.711 2.419 2.163 2.009 1.907 1.80 1.596 1.541 1.324 - - - - -
Pv (Pa) 20 11 9 7 5 3 3 2 2 2 1 1 1 - - - - -
225
Ps (Pa) 38 26 15 12 8 6 5 4 4 3 3 2 2 - - - - -
NC 30 24 18 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 - - - - -
Neck Velocity (m/s) 6.098 4.545 4.032 3.623 3.012 2.688 2.404 2.232 2.119 2.00 1.773 1.712 1.471 1.404 1.263 - - -
Pv (Pa) 24 13 11 8 6 4 3 3 3 2 2 2 1 1 1 - - -
250
Ps (Pa) 47 32 19 16 12 8 7 6 5 5 4 3 3 2 2 - - -
NC 33 27 22 18 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15 - - -
Neck Velocity (m/s) 6.707 5.00 4.435 3.986 3.313 2.957 2.644 2.455 2.331 2.20 1.950 1.884 1.618 1.545 1.389 - - -
Pv (Pa) 29 16 13 10 7 5 4 4 3 3 2 2 2 1 1 - - -
275
Ps (Pa) 57 38 23 20 15 10 8 7 6 6 4 4 3 3 2 - - -
NC 37 32 27 23 20 16 <15 <15 <15 <15 <15 <15 <15 <15 <15 - - -
GRILLES & REGISTERS

See notes on page C-7 Contd...

 RETURN AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
300 x 150 450 X 150 500 X 150 600 X 150 750 X 150 900 X 150 1050 X 150
300 X 200 450 X 200 500 X 200 600 X 200 750 X 200 900 X 200 1050 X 200
AIR FLOW Size (mm x mm)
300 X 260 450 X 250 500 X 250 600 X 250 750 X 250 900 X 250 1050 X 250
(L/s)
300 X 300 500 X 300 600 X 300 750 X 300 900 X 300 1050 X 300
Neck Area (m2­) 0.041 0.055 0.062 0.069 0.083 0.093 0.104 0.112 0.118 0.125 0.141 0.146 0.170 0.178 0.198 0.214 0.258 0.302
Neck Velocity (m/s) 7.317 5.455 4.839 4.348 3.614 3.226 2.885 2.679 2.542 2.400 2.128 2.055 1.765 1.685 1.515 1.402 - -
Pv (Pa) 35 19 15 12 8 7 5 4 4 3 3 3 2 2 1 1 - -
300
Ps (Pa) 68 45 26 24 18 12 9 9 8 7 5 5 4 3 3 13 - -
NC 39 34 30 27 25 18 17 16 15 <15 <15 <15 <15 <15 <15 <15 - -
Neck Velocity (m/s) 8.537 6.364 5.645 5.072 4.217 3.763 3.365 3.125 2.966 2.80 2.482 2.397 2.059 1.966 1.768 1.636 1.357 -
Pv (Pa) 48 26 21 16 11 9 7 6 5 5 4 3 2 2 2 2 1 -
350
Ps (Pa) 92 63 36 32 24 18 13 12 10 10 10 9 7 5 1749 3 2 -
NC 43 38 35 33 30 23 17 16 15 15 15 <15 <15 <15 <15 <15 <15 -
Neck Velocity (m/s) - 7.273 6.452 5.797 4.819 4.301 3.846 3.571 3.390 3.20 2.837 2.740 2.353 2.247 2.020 1.869 1.550 1.325
Pv (Pa) -- 34 27 21 15 12 9 8 7 6 5 4 3 3 2 2 1 1
400
Ps (Pa) - 82 48 43 33 23 19 17 16 15 15 11 9 5 2233 4 2 2
NC - 42 38 36 34 28 28 27 26 26 24 21 17 15 <15 <15 <15 <15
Neck Velocity (m/s) - - 7.258 6.522 5.422 4.839 4.327 4.018 3.814 3.60 3.191 3.082 2.647 2.528 2.273 2.103 1.744 1.490
Pv (Pa) - - 34 27 19 15 12 10 9 8 6 6 4 4 3 3 2 1
450
Ps (Pa) - - 62 56 41 29 25 23 22 29 19 17 13 10 9 5 3 2
NC - - 43 42 41 40 39 38 36 36 31 28 25 23 20 18 <15 <15
Neck Velocity (m/s) - - - 7.246 6.024 5.376 4.808 4.464 4.237 4.00 3.546 3.425 2.941 2.809 2.525 2.336 1.938 1.656
Pv (Pa) - - - 34 23 19 15 13 12 10 8 7 6 5 4 3 2 2
500
Ps (Pa) - - - 69 51 35 31 27 21 24 23 18 12 11 5 4 3 2
NC - - - 44 43 42 41 39 38 36 35 33 31 28 25 20 18 <15
Neck Velocity (m/s) - - - - - 6.452 5.769 5.357 5.085 4.80 4.255 4.110 3.529 3.371 3.030 2.804 2.326 1.987
Pv (Pa) - - - - - 27 21 18 17 15 12 11 9 7 5 5 3 2
600
Ps (Pa) - - - - - 51 40 37 36 36 35 32 28 20 18 11 10 10
NC - - - - - 41 42 39 39 38 38 35 33 30 28 25 20 18
Neck Velocity (m/s) - - - - - - - - 5.932 5.6 4.965 4.795 4.118 3.933 3.535 3.271 2.713 2.318
Pv (Pa) - - - - - - - - 23 20 16 15 11 10 8 7 4 3
700
Ps (Pa) - - - - - - - - 44 42 42 32 23 18 15 9 6 4
NC - - - - - - - - 47 45 44 38 35 33 30 28 25 20
Neck Velocity (m/s) - - - - - - - - 6.780 6.40 5.674 5.479 4.706 4.494 4.040 3.738 3.101 2.649
Pv (Pa) - - - - - - - - 40 26 20 19 14 13 10 9 7 4
800
Ps (Pa) - - - - - - - - 52 48 45 30 24 22 20 13 9 6
NC - - - - - - - - 49 47 45 40 37 34 33 30 27 24
GRILLES & REGISTERS

See notes on page C-7

C-17
Contd...
C-18
RETURN AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (SI UNITS)
300 x 150 450 X 150 500 X 150 600 X 150 750 X 150 900 X 150 1050 X 150
300 X 200 450 X 200 500 X 200 600 X 200 750 X 200 900 X 200 1050 X 200
AIR FLOW Size (mm x mm)
300 X 260 450 X 250 500 X 250 600 X 250 750 X 250 900 X 250 1050 X 250
(L/s)
300 X 300 500 X 300 600 X 300 750 X 300 900 X 300 1050 X 300
Neck Area (m2­) 0.041 0.055 0.062 0.069 0.083 0.093 0.104 0.112 0.118 0.125 0.141 0.146 0.170 0.178 0.198 0.214 0.258 0.302
Neck Velocity (m/s) - - - - - - - - - - - 6.164 5.294 5.056 4.545 4.206 3.488 2.980
Pv (Pa) - - - - - - - - - - - 24 18 16 13 11 10 5
900
Ps (Pa) - - - - - - - - - - - 36 26 24 20 17 12 8
NC - - - - - - - - - - - 41 38 35 34 31 28 25
Neck Velocity (m/s) - - - - - - - - - - - 6.849 5.882 5.618 5.051 4.673 3.876 3.311
Pv (Pa) - - - - - - - - - - - 30 22 20 16 14 12 7
1000
Ps (Pa) -- -- -- -- -- -- -- -- -- -- -- 45 33 30 24 21 15 9
NC - - - - - - - - - - - 42 39 38 35 32 30 28
Neck Velocity (m/s) - - - - - - - - - - - 8.219 7.059 6.742 6.061 5.607 4.651 3.974
Pv (Pa) - - - - - - - - - - - 44 32 29 24 20 18 10
1200
Ps (Pa) -- -- -- -- -- -- -- -- -- -- -- 65 48 44 35 30 20 14
NC - - - - - - - - - - - 43 40 39 37 35 32 30
Neck Velocity (m/s) - - - - - - - - - - - - 8.235 7.865 7.071 6.542 5.426 4.636
Pv (Pa) - - - - - - - - - - - - 43 40 32 27 28 13
1400
Ps (Pa) - - - - - - - - - - - - 65 59 47 41 27 18
NC - - - - - - - - - - - - 42 41 39 37 34 31
Neck Velocity (m/s) - - - - - - - - - - - - - - 8.081 7.477 6.202 5.298
Pv (Pa) - - - - - - - - - - - - - - 42 36 37 18
1600
Ps (Pa) - - - - - - - - - - - - - - 63 52 35 25
NC -- -- -- -- -- -- -- -- -- -- -- -- -- -- 40 39 39 35
Neck Velocity (m/s) - - - - - - - - - - - - - - - 8.411 6.977 5.960
Pv (Pa) - - - - - - - - - - - - - - - 45 40 23
1800
Ps (Pa) - - - - - - - - - - - - - - - 66 45 32
NC - - - - - - - - - - - - - - - 41 39 37
Neck Velocity (m/s) - - - - - - - - - - - - - - - - 7.752 6.623
Pv (Pa) - - - - - - - - - - - - - - - - 49 28
2000
Ps (Pa) - - - - - - - - - - - - - - - - 56 39
NC - - - - - - - - - - - - - - - - 42 39
Neck Velocity (m/s) - - - - - - - - - - - - - - - - - 7.285
Pv (Pa) - - - - - - - - - - - - - - - - - 34
2200
Ps (Pa) - - - - - - - - - - - - - - - - - 47
NC - - - - - - - - - - - - - - - - - 41
GRILLES & REGISTERS

See notes on page C-7

 GRILLES & REGISTERS

EGG CRATE GRILLES & REGISTERS : ECG & ECR - SI UNITS

Core Velocity (m/s) 1.50 2.00 2.50 3.00 3.50 4.00 5.00 6.00 7.00 7.50
Core Area Nominal Sizes
Velocity Pressure (Pa) 1 2 4 5 8 10 15 22 30 35
(m2) (mm x mm)
Negative SP (Pa) 3 5 8 12 16 21 33 48 65 74
175 X 100 L/S 21 28 35 42 50 57 71 85 99 106
0.014
150 X 125 NC - - - - - - 22 28 34 37
200 X 100 150 X 150 L/S 25 34 42 51 59 68 85 102 119 127
0.017
175 X 125 NC - - - - - - 34 40 45 47
250 X 100 175 X 150 L/S 31 42 52 62 73 83 104 125 145 156
0.020
200 X 125 NC - - - - - - 23 30 36 38
300 X 100 200 X 150 L/S 39 49 61 74 86 98 123 147 172 184
0.024
250 X 125 NC - - - - - 15 24 31 36 39
350 X 100 L/S 42 57 71 85 99 113 142 170 198 212
0.028
NC - - - - - 16 24 31 37 40
400 X 100 250 X 150 L/S 48 64 80 96 112 128 160 192 225 241
0.032
300 X 125 NC - - - - - 16 25 32 37 40
450 X 100 300 X 150 L/S 55 74 92 110 129 147 184 221 258 276
0.036
350 X 125 200 X 200 NC - - - - - 17 25 32 38 41
500 X 100 350 X 150 L/S 65 87 108 130 152 174 217 260 304 325
0.043
400 X 125 250 X 200 NC - - - - - 18 26 33 39 41
600 X 100 400 X 150 L/S 74 98 123 147 172 196 245 294 343 368
0.048
450 X 125 NC - - - - - 18 26 33 39 42
700 X 100 450 X 150 250 X 250 L/S 85 113 142 170 198 226 283 340 396 425
0.056
500 X 125 300 X 200 NC - - - - - 19 27 34 40 42
750 X 100 500 X 150 300 X 250 L/S 98 130 163 195 228 260 325 391 456 488
0.064
600 X 125 350 X 200 NC - - - - - 19 28 34 40 43
900 X 100 550 X 150 350 X 250 L/S 115 153 191 229 267 306 382 458 535 573
0.075
700 X 125 400 X 200 NC - - - - - 20 28 35 41 43
1000 X 100 650 X 150 400 X 250 L/S 127 170 212 255 297 340 425 509 594 637
0.084
750 X 125 450 X 200 300 X 300 NC - - - - 15 20 29 35 41 44
1200 X 100 750 X 150 350 X 300 L/S 151 202 252 303 353 404 505 606 707 757
0.099
900 X 125 450 X 250 NC - - - - 16 21 29 36 42 45
850 X 150 500 X 250 350 X 350 L/S 167 223 278 334 390 445 557 668 779 835
0.110
600 X 200 400 X 300 NC - - - - 16 21 30 37 42 45
150 X 100 900 X 150 400 X 350 L/S 190 253 316 379 442 506 632 758 885 948
0.124
1200 X 125 450 X 300 NC - - - - 17 22 30 37 43 45
1800 X 100 600 X 250 450 X 350 L/S 226 302 377 453 528 604 755 906 1057 1132
0.149
750 X 200 550 X 300 400 X 400 NC - - - - 17 22 31 38 44 46
1500 X 125 900 X 200 600 X 300 450 X 400 L/S 255 340 425 509 594 679 849 1019 1189 1274
0.167
1200 X 150 750 X 250 500 X 350 NC - - - - 18 23 31 38 44 47
1800 X 125 1000 X 200 750 X 300 500 X 400 L/S 294 392 491 589 687 785 981 1177 1374 1472
0.193
1500 X 150 900 X 250 600 X 350 450 X 450 NC - - - - 18 23 32 39 45 47
1800 X 150 800 X 300 600 X 400 L/S 354 462 578 693 825 925 1156 1387 1618 1733
0.228
1200 X 200 650 X 350 500 X 450 NC - - - - 19 24 33 39 45 48
900 X 300 650 X 400 550 X 500 L/S 393 525 656 787 918 1049 1311 1574 1836 1967
0.258
750 X 350 600 X 450 NC - - - - 20 25 33 40 45 48
1500 X 200 1000 X 300 750 X 400 600 X 500 L/S 440 587 733 880 1027 1174 1467 1760 2054 2200
0.289
1200 X 250 900 X 350 650 X 450 NC - - - - 20 25 33 40 46 49
1800 X 200 1200 X 300 750 X 450 L/S 511 681 851 1022 1192 1362 1703 2043 2384 2552
0.335
1500 X 250 900 X 400 600 X 600 NC - - - - 21 26 34 41 47 49
1200 X 350 800 X 500 L/S 607 809 1012 1214 1417 1619 2024 2428 2833 3035
0.399
900 X 450 700 X 600 NC - - - 15 21 26 35 42 47 50
1800 X 250 900 X 500 L/S 658 877 1097 1316 1535 1755 2193 2632 3071 3290
0.432
1200 X 400 750 X 600 NC - - - 16 22 27 35 42 48 50
1800 X 300 1200 X 450 L/S 790 1053 1316 1579 1842 2106 2632 3158 3685 3948
0.518
1500 X 350 900 X 600 NC - - - 16 22 27 36 43 48 51
1800 X 350 1200 X 500 L/S 884 1179 1474 1769 2064 2358 2948 3538 4127 4422
0.581
1500 X 400 750 X 750 NC - - - 16 22 27 36 43 48 51
See notes on page C-7
C-19
 GRILLES & REGISTERS

PERFORATED GRILLES & REGISTERS: PAG & PAR - SI UNITS

Core Velocity (m/s) 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00
Core Nominal Sizes
Velocity Pressure (Pa) <1 1 2 4 5 8 10 12 15
Area (m2) (mm x mm)
Negative SP (Pa) 5 11 19 29 43 58 75 96 118
175 X 100 L/s 14 21 28 35 42 50 57 64 71
0.014
150 X 125 NC - - - 20 25 29 33 36 39
200 X 100 150 X 150 L/s 17 25 34 42 51 59 68 76 85
0.017
175 X 125 NC - - - 20 25 29 33 36 39
250 X 100 175 X 150 L/s 21 31 42 52 62 73 83 93 104
0.020
200 X 125 NC - - - 20 25 29 33 36 39
300 X 100 200 X 150 L/s 25 37 49 61 74 86 98 110 123
0.024
250 X 125 NC - - - 20 25 29 33 36 39
350 X 100 L/s 28 42 57 71 85 99 113 127 142
0.028
NC - - - 20 25 29 33 36 39
400 X 100 250 X 150 L/s 32 48 64 80 96 112 128 144 160
0.032
300 X 125 NC - - - 20 25 29 33 36 39
450 X 100 300 X 150 L/s 37 55 74 92 110 129 147 166 184
0.036
350 X 125 200 X 200 NC - - - 20 25 29 33 36 39
500 X 100 350 X 150 L/s 43 65 87 108 130 152 174 195 217
0.043
400 X 125 250 X 200 NC - - - 20 25 29 33 36 39
600 X 100 400 X 150 L/s 49 74 98 123 147 172 196 221 245
0.048
450 X 125 NC - - - 20 25 29 33 36 39
700 X 100 450 X 150 250 X 250 L/s 57 85 113 142 170 198 226 255 283
0.056
500 X 125 300 X 200 NC - - - 20 25 29 33 36 39
750 X 100 500 X 150 300 X 250 L/s 65 98 130 163 195 228 260 293 325
0.064
600 X 125 350 X 200 NC - - - 20 25 29 33 36 39
900 X 100 550 X 150 350 X 250 L/s 76 115 153 191 229 267 306 344 382
0.075
700 X 125 400 X 200 NC - - - 20 25 29 33 36 39
1000 X 100 650 X 150 400 X 250 L/s 85 127 170 212 255 297 340 382 425
0.084
750 X 125 450 X 200 300 X 300 NC - - - 20 25 29 33 36 39
1200 X 100 750 X 150 350 X 300 L/s 101 151 202 252 303 353 404 454 505
0.099
900 X 125 450 X 250 NC - - - 20 25 29 33 36 39
850 X 150 550 X 250 350 X 350 L/s 111 167 223 278 334 390 445 501 557
0.110
600 X 200 400 X 300 NC - - - 20 25 29 33 36 39
150 X 100 900 X 150 400 X 350 L/s 126 190 253 316 379 442 506 569 632
0.124
1200 X 125 450 X 300 NC - - - 20 25 29 33 36 39
1800 X 100 600 X 250 450 X 350 L/s 151 226 302 377 453 528 604 679 755
0.149
750 X 200 550 X 300 400 X 400 NC - - - 20 25 29 33 36 39
1500 X 125 900 X 200 600 X 300 450 X 400 L/s 170 255 340 425 509 594 679 764 849
0.167
1200 X 150 750 X 250 500 X 350 NC - - - 20 25 29 33 36 39
1800 X 125 1000 X 200 750 X 300 500 X 400 L/s 196 294 392 491 589 687 785 883 981
0.193
1500 X 150 900 X 250 600 X 650 450 X 450 NC - - - 20 25 29 33 36 39
1800 X 150 800 X 300 600 X 400 L/s 231 347 462 578 693 809 925 1040 1156
0.228
1200 X 200 650 X 350 500 X 450 NC - - - 20 25 29 33 36 39
900 X 300 650 X 400 550 X 500 L/s 262 393 525 656 787 918 1049 1180 1311
0.258
750 X 350 600 X 450 NC - - - 20 25 29 33 36 39
1500 X 200 1000 X 300 750 X 400 600 X 500 L/s 293 440 587 733 880 1027 1174 1320 1467
0.289
1200 X 250 900 X 350 650 X 450 NC - - - 20 25 29 33 36 39
1800 X 200 1200 X 300 750 X 450 L/s 341 511 681 851 1022 1192 1362 1533 1703
0.335
1500 X 250 900 X 400 600 X 600 NC - - - 20 25 29 33 36 39
1200 X 350 800 X 500 L/s 405 607 809 1012 1214 1417 1619 1821 2024
0.339
900 X 450 700 X 600 NC - - - 20 25 29 33 36 39
1800 X 250 900 X 500 L/s 439 658 877 1097 1316 1535 1755 1974 2193
0.432
1200 X 400 750 X 600 NC - - - 20 25 29 33 36 39
1800 X 300 1200 X 450 L/s 526 790 1053 1316 1579 1842 2108 2369 2632
0.518
1500 X 350 900 X 6000 NC - - - 20 25 29 33 36 39
1800 X 350 1200 X 500 L/s 590 884 1179 1474 1769 2064 2358 2653 2948
0.581
1500 X 400 750 X 750 NC - - - 20 25 29 33 36 39
See notes on page C-7
C-20
 GRILLES & REGISTERS

DOOR GRILLES: DG - SI UNITS

Core Velocity (m/s) 0.50 0.75 1.00 1.25 1.50 1.75 2.00
Core Area Nominal Sizes Velocity Pressure (Pa) <1 <1 <1 1 1 2 2
(m2) (mm x mm)
Negative SP (Pa) 3 6 11 18 26 35 46
250 X 100 175 X 150 L/s 12 18 24 30 35 42 47
0.025
200 X 125 NC - - - - 16 20 24
600 X 100 450 X 125 L/s 24 35 47 59 71 83 94
0.046
400 X 150 NC - - - 20 26 29 32
800 X 100 500 X 150 300 X 250 L/s 35 53 71 89 106 124 142
0.070
400 X 200 650 X 150 NC - - 19 25 30 34 37
500 X 200 400 X 250 L/s 47 71 94 118 142 165 189
0.093
350 X 300 700 X 150 NC - 15 23 29 33 37 41
750 X 200 500 X 300 L/s 71 106 142 177 212 248 283
0.139
600 X 250 400 X 350 NC - 20 28 33 38 42 45
1000 X 200 500 X 400 650 X 300 L/s 94 142 189 236 283 307 377
0.186
800 X 250 550 X 350 NC - 24 31 37 42 46 49
1000 X 250 700 X 350 550 X 450 L/s 118 177 236 295 354 413 472
0.232
800 X 300 600 X 400 NC 16 27 34 40 44 48 52
1000 X 300 750 X 400 600 X 500 L/s 142 212 283 354 425 495 566
0.279
850 X 350 650 X 450 NC 18 29 36 42 47 50 54
950 X 350 750 X 450 600 X 550 L/s 165 248 307 413 495 578 660
0.325
850 X 400 700 X 500 NC 20 31 38 44 48 52 56
950 X 400 800 X 500 650 X 600 L/s 189 283 377 472 566 660 755
0.372
850 X 450 700 X 550 NC 22 32 40 45 50 54 57
950 X 450 800 X 550 650 X 650 L/s 212 318 425 531 637 743 849
0.418
850 X 500 700 X 600 NC 23 34 41 47 51 55 59
950 X 500 800 X 600 700 X 700 L/s 236 354 472 590 708 825 943
0.464
850 X 550 750 X 650 NC 25 35 42 48 53 57 60
See notes on page C-7

C-21
 GRILLES & REGISTERS

PERFORMANCE DATA - IP UNITS

Symbols Notes
CFM : Air Volume in cubic feet per minute The large throw values are based on the minimum terminal
velocity of 50 fpm.
Af : Effective free area in square feet
The middle throw values are based on the medium terminal
Vf : Face Velocity in feet per minute
velocity of 100 fpm.
Ak : Neck Area in square feet
The small throw values are based on the maximum terminal
Vk : Neck Velocity in feet per minute velocity of 150 fpm.
Ps : Static pressure in inches water gauge
Conditions
Pv : Velocity pressure in inches water gauge
• Supply or Return as indicated.
Pt : Total pressure in inches water gauge • Noise Criteria values are based on (10dB) room attenuation.
Th : Throw in feet • Damper is fully open.
NC : Noise Criteria. • Maximum room height = 4.0m
• Maximum Cooling @ ∆T = 10K

NOTES

C-22
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)
12 X 6 18 X 6 20 X 6 24 X 6
Size 12 X 8 18 X 20 20 X 8
AIR FLOW (CFM)

(in x in

Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (ft2) 0.441 0.592 0.667 0.743 0.893 1.001
Frea Area (ft2) 0.226 0.183 0.301 0.258 0.344 0.291 0.387 0.323 0.527 0.441 0.613 0.517
Face Velocity fpm 952 1176 714 833 625 741 556 667 408 488 351 417
Neck Velocity fpm 488 364 323 290 241 215
Ps (in-wg) 0.040 0.072 0.020 0.037 0.015 0.027 0.007 0.013 0.004 0.007 0.003 0.005
212

Pt (in-wg) 0.053 0.086 0.029 0.045 0.021 0.033 0.011 0.016 0.006 0.009 0.004 0.007
Throw (ft) 11 16 23 6 13 21 11 13 20 5 8 14 10 12 19 5 8 13 9 11 18 4 7 12 8 10 17 4 7 11 8 10 17 3 6 11
NC < 15 15 <15 <15 <15 <15 <15 <15 <15 <15 <15 <15
Face Velocity fpm 1190 1471 893 1042 781 926 694 833 510 610 439 521
Neck Velocity fpm 610 455 403 362 301 269
Ps (in-wg) 0.061 0.109 0.031 0.057 0.023 0.042 0.011 0.021 0.006 0.011 0.004 0.008
265

Pt (in-wg) 0.085 0.135 0.045 0.071 0.032 0.051 0.016 0.025 0.009 0.014 0.006 0.010
Throw (ft) 13 16 23 7 12 16 13 15 23 7 11 17 13 14 22 7 11 16 12 14 21 7 10 15 11 13 21 6 10 15 11 13 21 6 10 14
NC < 15 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 1429 1765 1071 1250 938 1111 833 1000 612 732 526 625
Neck Velocity fpm 732 546 484 435 361 323
Ps (in-wg) 0.088 0.159 0.045 0.082 0.033 0.060 0.020 0.037 0.009 0.016 0.006 0.012
318

Pt (in-wg) 0.123 0.194 0.068 0.103 0.047 0.075 0.027 0.044 0.013 0.020 0.009 0.014
Throw (ft) 14 18 25 9 13 18 14 17 24 8 12 18 15 17 24 8 12 17 13 16 23 8 12 17 12 16 23 7 11 16 12 15 22 7 11 16
NC 15 21 15 20 <15 18 <15 15 <15 <15 <15 <15
Face Velocity fpm 1667 2059 1250 1458 1094 1296 972 1167 714 854 614 729
Neck Velocity fpm 854 636 565 507 422 376
Ps (in-wg) 0.120 0.216 0.062 0.112 0.045 0.082 0.036 0.065 0.012 0.022 0.009 0.015
371

Pt (in-wg) 0.166 0.263 0.090 0.137 0.066 0.103 0.051 0.080 0.019 0.029 0.014 0.021
Throw (ft) 16 20 27 11 15 19 15 19 26 10 14 19 15 18 28 10 14 18 14 18 25 9 13 18 14 18 25 9 13 18 14 18 25 9 13 17
NC 18 23 26 22 21 21 18 20 <15 18 <15 15
Face Velocity fpm 1905 2353 1429 1667 1250 1482 1111 1333 816 976 702 833
Neck Velocity fpm 976 727 645 580 482 430
Ps (in-wg) 0.156 0.283 0.081 0.146 0.059 0.107 0.047 0.084 0.019 0.034 0.008 0.014
424

Pt (in-wg) 0.213 0.341 0.112 0.178 0.085 0.133 0.068 0.105 0.027 0.043 0.011 0.017
Throw (ft) 17 21 28 13 16 21 17 20 28 12 15 20 16 20 27 12 15 20 16 20 27 11 15 20 15 19 27 10 14 19 15 19 27 10 14 19
NC 27 29 26 28 25 27 22 25 <15 18 <15 15
Face Velocity fpm - - 1607 1875 1406 1667 1250 1500 918 1098 789 938
Neck Velocity fpm - 818 726 652 542 484
Ps (in-wg) - - 0.102 0.185 0.075 0.136 0.059 0.107 0.028 0.050 0.007 0.012
477

Pt (in-wg) - - 0.139 0.222 0.106 0.167 0.086 0.134 0.044 0.066 0.013 0.018
Throw (ft) - - - - - - 18 22 30 13 17 22 17 21 29 13 17 21 17 21 29 12 15 20 16 20 29 11 16 21 15 20 29 11 15 20
NC - - 34 40 29 35 26 32 <15 <15 <15 <15
Face Velocity fpm - - 1786 2083 1563 1852 1389 1667 1020 1220 877 1042
Neck Velocity fpm - 909 806 725 602 538
Ps (in-wg) - - 0.125 0.227 0.092 0.167 0.072 0.132 0.034 0.062 0.018 0.033
530

Pt (in-wg) - - 0.175 0.275 0.130 0.205 0.104 0.163 0.055 0.083 0.034 0.049
Throw (ft) - - - - - - 19 23 32 14 18 23 19 23 32 14 18 22 18 22 31 14 16 21 17 22 31 13 17 22 17 21 30 13 16 21
NC - - 37 43 32 39 29 35 18 24 < 15 < 15
Face Velocity fpm - - 1964 2292 1719 2037 1528 1833 1122 1341 965 1146
Neck Velocity fpm - 1000 887 797 663 591
Ps (in-wg) - - 0.152 0.275 0.118 0.202 0.088 0.159 0.041 0.075 0.029 0.052
583

Pt (in-wg) - - 0.212 0.335 0.167 0.251 0.126 0.198 0.069 0.103 0.050 0.073
Throw (ft) - - - - - - 20 24 34 15 19 25 20 24 33 15 18 24 19 23 33 15 18 23 18 23 32 14 18 23 18 22 31 14 18 23
NC - - 40 46 35 41 32 38 21 27 < 15 < 15

See notes on page C-22 Contd...

C-23
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)
30 x 6 36 x 6
Size 24 x 8 30 x 8
AIR FLOW (CFM)

(in x in 18 x 10 20 x 10 24 x 10
18 x 12 20 x 12
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (ft2) 1.120 1.206 1.270 1.346 1.518
Frea Area (ft2) 0.721 0.603 0.786 0.657 0.829 0.700 0.915 0.764 1.044 0.872
Face Velocity fpm 299 357 274 328 - - - - - -
Neck Velocity fpm 192 179 - - -
Ps (in-wg) 0.002 0.003 0.002 0.003 - - - - - -
212

Pt (in-wg) 0.004 0.005 0.003 0.004 - - - - - -

Throw (ft) 8 9 17 3 6 11 7 9 16 3 6 10 - - - - - - - - - - - - - - - - - -
NC < 15 < 15 < 15 < 15 - - - - - -
Face Velocity fpm 373 446 342 410 325 385 - - - -
Neck Velocity fpm 240 223 212 - -
Ps (in-wg) 0.003 0.006 0.002 0.004 0.002 0.004 - - - -
265

Pt (in-wg) 0.004 0.007 0.003 0.005 0.003 0.005 - - - -

Throw (ft) 10 13 21 6 9 14 10 13 20 5 9 14 10 12 20 5 9 4 - - - - - - - - - - - -
NC < 15 < 15 < 15 < 15 < 15 < 15 - - - -
Face Velocity fpm 448 536 411 492 390 462 - - - -
Neck Velocity fpm 288 268 254 - -
Ps (in-wg) 0.004 0.008 0.003 0.006 0.003 0.005 - - - -
318

Pt (in-wg) 0.007 0.010 0.005 0.008 0.005 0.007 - - - -

Throw (ft) 12 15 22 7 11 15 12 15 22 8 13 18 10 13 19 7 11 15 - - - - - - - - - - - -
NC < 15 < 15 < 15 < 15 < 15 < 15 - - - -
Face Velocity fpm 522 625 479 574 455 538 - - - -
Neck Velocity fpm 337 313 297 - -
Ps (in-wg) 0.006 0.011 0.005 0.009 0.004 0.007 - - - -
371

Pt (in-wg) 0.010 0.020 0.008 0.012 0.007 0.010 - - - -

Throw (ft) 14 18 25 8 13 17 14 17 25 11 15 21 10 15 20 8 13 17 - - - - - - - - - - - -
NC < 15 < 15 < 15 < 15 < 15 < 15 - - - -
Face Velocity fpm 597 714 548 656 519 615 - - - -
Neck Velocity fpm 385 357 339 - -
Ps (in-wg) 0.005 0.009 0.004 0.007 0.003 0.006 - - - -
424

Pt (in-wg) 0.008 0.018 0.006 0.009 0.005 0.008 - - - -

Throw (ft) 15 19 26 9 14 19 14 18 26 9 14 19 14 18 26 9 14 19 - - - - - - - - - - - -
NC < 15 < 15 < 15 < 15 < 15 < 15 - - - -
Face Velocity fpm 672 804 616 738 584 692 529 634 - -
Neck Velocity fpm 433 402 381 360 -
Ps (in-wg) 0.004 0.007 0.003 0.005 0.002 0.004 0.002 0.003 - -
477

Pt (in-wg) 0.008 0.011 0.006 0.008 0.005 0.006 0.003 0.005 - -

Throw (ft) 15 24 19 11 14 20 15 19 28 11 14 19 14 19 28 10 14 19 14 19 28 10 14 19 - - - - - -
NC < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 - -
Face Velocity fpm 746 893 685 820 649 769 588 704 515 617
Neck Velocity fpm 481 446 424 400 355
Ps (in-wg) 0.003 0.005 0.002 0.003 0.001 0.003 0.001 0.002 0.001 0.001
530

Pt (in-wg) 0.006 0.009 0.004 0.006 0.004 0.005 0.003 0.003 0.001 0.002
Throw (ft) 16 24 22 12 16 20 16 20 30 12 16 20 15 20 30 12 15 21 15 20 29 21 15 20 15 20 29 12 15 20
NC < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 821 982 753 902 714 846 647 775 567 679
Neck Velocity fpm 529 491 466 440 390
Ps (in-wg) 0.014 0.025 0.001 0.002 0.001 0.001 0.000 0.001 0.000 0.000
583

Pt (in-wg) 0.029 0.040 0.002 0.003 0.001 0.002 0.001 0.001 0.000 0.001
Throw (ft) 17 22 31 14 17 22 17 21 31 13 17 22 17 21 31 13 17 22 17 21 30 18 17 22 16 21 30 13 17 21
NC < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15

See notes on page C-22 Contd...

C-24
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)
42 x 6
Size 36 x 8 42 x 8
AIR FLOW (CFM)

(in x in 30 x 10 36 x 10
24 x 12 30 x 12
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (ft2) 1.572 1.830 1.916 2.131 2.304
Frea Area (ft2) 1.109 0.936 1.302 1.098 1.442 1.205 1.679 1.410 1.959 1.647
Face Velocity fpm - - - - - - - - - -
Neck Velocity fpm - - - - - - - - - -
Ps (in-wg) - - - - - - - - - -
212

Pt (in-wg) - - - - - - - - - -
Throw (ft) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity fpm - - - - - - - - - -
Neck Velocity fpm - - - - - - - - - -
Ps (in-wg) - - - - - - - - - -
265

Pt (in-wg) - - - - - - - - - -
Throw (ft) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity fpm - - - - - - - - - -
Neck Velocity fpm - - - - - - - - - -
Ps (in-wg) - - - - - - - - - -
318

Pt (in-wg) - - - - - - - - - -
Throw (ft) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity fpm - - - - - - - - - -
Neck Velocity fpm - - - - - - - - - -
Ps (in-wg) - - - - - - - - - -
371

Pt (in-wg) - - - - - - - - - -
Throw (ft) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity fpm - - - - - - - - - -
Neck Velocity fpm - - - - - - - - - -
Ps (in-wg) - - - - - - - - - -
424

Pt (in-wg) - - - - - - - - - -
Throw (ft) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity fpm - - - - - - - - - -
Neck Velocity fpm - - - - - - - - - -
Ps (in-wg) - - - - - - - - - -
477

Pt (in-wg) - - - - - - - - - -
Throw (ft) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity fpm - - - - - - - - - -
Neck Velocity fpm - - - - - - - - - -
Ps (in-wg) - - - - - - - - - -
530

Pt (in-wg) - - - - - - - - - -
Throw (ft) - - - - - - - - - -
NC - - - - - - - - - -
Face Velocity fpm 534 632 455 539 - - - - - -
Neck Velocity fpm 377 325 - - - - - -
Ps (in-wg) 0.000 0.000 0.030 0.000 - - - - - -
583

Pt (in-wg) 0.000 0.000 0.000 0.000 - - - - - -

Throw (ft) 16 21 30 13 17 21 16 20 29 13 16 21 - - - - - -
NC < 15 < 15 < 15 < 15 - - - - - -

See notes on page C-22 Contd...

C-25
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)
18 X 6 20 X 6 24 X 6 30 x 6
Size 18 X 20 20 X 8
AIR FLOW (CFM)

(in x in 18 x 10

Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (ft2) 0.667 0.743 0.893 1.001 1.120
Frea Area (ft2) 0.344 0.291 0.387 0.323 0.527 0.441 0.613 0.517 0.721 0.603
Face Velocity fpm 1875 2222 1667 2000 1224 1463 1053 1250 896 1071
Neck Velocity fpm 968 870 723 645 577
Ps (in-wg) 0.140 0.242 0.105 0.191 0.049 0.089 0.034 0.062 0.024 0.043
636

Pt (in-wg) 0.196 0.299 0.151 0.237 0.084 0.125 0.059 0.087 0.045 0.064
Throw (ft) 20 24 33 15 19 24 18 23 33 15 18 23 19 23 33 14 18 23 18 22 33 14 18 23 18 22 31 14 18 23
NC 38 44 35 41 23 30 17 24 < 15 18
Face Velocity fpm - - 1944 2333 1429 1707 1228 1458 1045 1250
Neck Velocity fpm - 1014 843 753 673
Ps (in-wg) - - 0.143 0.259 0.067 0.121 0.046 0.084 0.032 0.058
742

Pt (in-wg) - - 0.200 0.316 0.114 0.168 0.082 0.121 0.058 0.084

Throw (ft) - - - - - - 18 24 34 17 19 25 20 24 34 16 19 24 19 23 34 16 19 24 19 23 32 16 18 24
NC - - 40 46 28 35 22 29 < 15 23
Face Velocity fpm - - - - 1633 1951 1404 1667 1194 1429
Neck Velocity fpm - - 964 860 769
Ps (in-wg) - - - - 0.087 0.158 0.061 0.110 0.042 0.076
848

Pt (in-wg) - - - - 0.145 0.216 0.108 0.158 0.079 0.113

Throw (ft) - - - - - - - - - - - - 22 26 36 18 21 26 21 25 36 17 20 25 21 25 35 17 19 25
NC - - - - 32 39 26 33 20 27
Face Velocity fpm - - - - 1837 2195 1579 1875 1343 1607
Neck Velocity fpm - - 1084 968 865
Ps (in-wg) - - - - 0.110 0.200 0.077 0.139 0.053 0.097
954

Pt (in-wg) - - - - 0.179 0.269 0.135 0.198 0.101 0.145

Throw (ft) - - - - - - - - - - - - 24 29 40 19 23 27 24 29 39 18 22 26 23 27 38 18 21 26
NC - - - - 36 43 30 37 24 31
Face Velocity fpm - - - - 2041 2439 1754 2083 1493 1786
Neck Velocity fpm - - 1205 1075 962
Ps (in-wg) - - - - 0.137 0.248 0.095 0.173 0.066 0.120
1060

Pt (in-wg) - - - - 0.220 0.331 0.165 0.242 0.122 0.176

Throw (ft) - - - - - - - - - - - - 26 32 42 20 24 29 26 31 41 20 23 28 25 30 41 18 22 27
NC - - - - 40 46 33 40 28 34
Face Velocity fpm - - - - - - 2105 2500 1791 2143
Neck Velocity fpm - - - 1290 1154
Ps (in-wg) - - - - - - 0.131 0.249 0.095 0.172
1272

Pt (in-wg) - - - - - - 0.227 0.344 0.166 0.243

Throw (ft) - - - - - - - - - - - - - - - - - - 29 35 47 22 25 30 28 34 45 20 24 29
NC - - - - - - 38 46 33 40
Face Velocity fpm - - - - - - - - 2090 2500
Neck Velocity fpm - - - - 1346
Ps (in-wg) - - - - - - - - 0.129 0.234
1484

Pt (in-wg) - - - - - - - - 0.227 0.332

Throw (ft) - - - - - - - - - - - - - - - - - - - - - - - - 31 38 50 21 26 31
NC - - - - - - - - 38 45
Face Velocity fpm - - - - - - - - - -
Neck Velocity fpm - - - - -
Ps (in-wg) - - - - - - - - - -
1696

Pt (in-wg) - - - - - - - - - -
Throw (ft) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
NC - - - - - - - - - -

See notes on page C-22 Contd...

C-26
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)
36 x 6 42 x 6
Size 24 x 8 30 x 8
AIR FLOW (CFM)

(in x in 20 x 10 24 x 10
18 x 12 20 x 12
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (ft2) 1.206 1.270 1.346 1.518 1.572
Frea Area (ft2) 0.786 0.657 0.829 0.700 0.915 0.764 1.044 0.872 1.109 0.936
Face Velocity fpm 822 984 779 923 706 845 619 741 583 690
Neck Velocity fpm 536 508 480 426 411
Ps (in-wg) 0.010 0.016 0.008 0.014 0.002 0.029 0.001 0.002 0.001 0.002
636

Pt (in-wg) 0.017 0.024 0.016 0.022 0.004 0.006 0.003 0.003 0.001 0.003
Throw (ft) 18 22 31 14 18 23 18 21 31 14 18 23 18 21 31 14 18 22 17 21 30 14 17 22 17 21 30 14 17 22
NC < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 959 1148 909 1077 824 986 722 864 680 805
Neck Velocity fpm 625 593 560 497 479
Ps (in-wg) 0.027 0.048 0.024 0.042 0.012 0.063 0.003 0.006 0.003 0.005
742

Pt (in-wg) 0.047 0.068 0.045 0.063 0.024 0.034 0.008 0.011 0.007 0.009
Throw (ft) 18 23 32 16 18 23 18 22 31 16 18 23 18 22 31 15 18 23 17 21 31 15 18 23 17 21 31 15 18 23
NC < 15 19 < 15 17 < 15 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 1096 1312 1039 1231 941 1127 825 988 777 920
Neck Velocity fpm 714 678 640 567 548
Ps (in-wg) 0.035 0.062 0.030 0.055 0.025 0.045 0.012 0.021 0.010 0.018
848

Pt (in-wg) 0.060 0.088 0.056 0.080 0.046 0.065 0.025 0.034 0.023 0.031
Throw (ft) 20 24 34 17 19 24 20 23 34 17 19 24 19 23 33 16 19 24 19 22 33 16 19 23 18 22 33 15 19 23
NC 17 20 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 1233 1475 1169 1385 1059 1268 928 1111 874 1034
Neck Velocity fpm 804 763 720 638 616
Ps (in-wg) 0.043 0.079 0.038 0.070 0.031 0.056 0.023 0.040 0.019 0.036
954

Pt (in-wg) 0.081 0.116 0.075 0.107 0.057 0.077 0.044 0.061 0.040 0.057
Throw (ft) 22 27 37 18 21 25 22 26 37 17 21 25 21 26 36 17 21 26 21 25 36 17 21 25 20 25 36 16 20 24
NC 21 23 22 < 15 18 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 1370 1639 1299 1539 1177 1408 1031 1235 971 1149
Neck Velocity fpm 893 847 800 709 685
Ps (in-wg) 0.054 0.098 0.048 0.087 0.038 0.070 0.028 0.050 0.024 0.044
1060

Pt (in-wg) 0.102 0.146 0.093 0.132 0.073 0.097 0.056 0.077 0.048 0.068
Throw (ft) 24 29 39 18 22 26 24 28 39 17 22 26 23 28 38 17 21 26 23 27 38 17 21 26 22 27 37 17 20 25
NC 24 28 23 29 19 25 < 15 20 < 15 18
Face Velocity fpm 1644 1967 1558 1846 1412 1690 1237 1482 1165 1379
Neck Velocity fpm 1071 1017 960 851 822
Ps (in-wg) 0.078 0.141 0.069 0.124 0.055 0.100 0.040 0.071 0.035 0.063
1272

Pt (in-wg) 0.148 0.211 0.129 0.184 0.105 0.150 0.086 0.117 0.074 0.102
Throw (ft) 27 33 46 20 24 28 27 32 43 19 24 28 26 31 41 19 23 27 26 30 41 18 22 27 25 30 40 18 22 26
NC 30 30 28 35 25 31 20 26 17 23
Face Velocity fpm 1918 2295 1818 2154 1647 1972 1443 1728 1359 1609
Neck Velocity fpm 1250 1186 1120 993 959
Ps (in-wg) 0.106 0.191 0.093 0.169 0.075 0.136 0.055 0.097 0.047 0.086
1484

Pt (in-wg) 0.198 0.284 0.180 0.256 0.152 0.211 0.146 0.154 0.104 0.143
Throw (ft) 31 37 50 21 26 30 30 36 48 21 25 29 30 36 46 21 25 29 30 35 46 20 24 28 29 35 45 20 24 28
NC 35 42 33 40 30 36 25 31 22 28
Face Velocity fpm 2192 2623 2078 2462 1882 2254 1650 1975 1553 1839
Neck Velocity fpm 1429 1356 1280 1135 1096
Ps (in-wg) 0.137 0.249 0.121 0.220 0.099 0.178 0.071 0.127 0.062 0.112
1696

Pt (in-wg) 0.252 0.364 0.237 0.336 0.199 0.275 0.188 0.200 0.135 0.185
Throw (ft) 33 40 52 23 27 32 32 40 51 23 26 30 32 40 51 23 26 30 32 39 51 22 26 30 31 38 50 21 26 29
NC 39 46 37 44 34 40 29 35 26 33

See notes on page C-22 Contd...

C-27
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)

Size 36 x 8 42 x 8
AIR FLOW (CFM)

(in x in 30 x 10 36 x 10 42 x 10
24 x 12 30 x 12 36 x 12 42 x 12
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (ft2) 1.830 1.916 2.131 2.304 2.777 3.251
Frea Area (ft2) 1.302 1.098 1.442 1.205 1.679 1.410 1.959 1.647 2.454 2.067 2.928 2.454
Face Velocity fpm 496 588 - - - - - - - - - -
Neck Velocity fpm 355 - - - - -
Ps (in-wg) 0.000 0.001 - - - - - - - - - -
636

Pt (in-wg) 0.001 0.001 - - - - - - - - - -

Throw (ft) 16 20 29 14 17 22 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
NC < 15 < 15 - - - - - - - - - -
Face Velocity fpm 579 686 522 625 449 534 - - - - - -
Neck Velocity fpm 414 393 354 - - -
Ps (in-wg) 0.001 0.002 0.001 0.002 0.001 0.001 - - - - - -
742

Pt (in-wg) 0.004 0.005 0.003 0.004 0.002 0.002 - - - - - -

Throw (ft) 17 21 30 14 17 22 16 20 29 14 17 22 16 20 29 14 17 22 - - - - - - - - - - - - - - - - - -
NC < 15 < 15 < 15 < 15 < 15 < 15 - - - - - -
Face Velocity fpm 661 784 597 714 513 611 440 523 351 417 - -
Neck Velocity fpm 473 449 404 374 310 -
Ps (in-wg) 0.002 0.004 0.002 0.003 0.001 0.002 0.001 0.001 0.001 0.001 - -
848

Pt (in-wg) 0.006 0.007 0.005 0.006 0.003 0.004 0.002 0.003 0.002 0.002 - -
Throw (ft) 18 21 32 15 20 23 18 21 31 15 18 22 17 21 31 14 18 22 17 20 27 14 18 20 16 20 30 14 18 21 - - - - - -
NC < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 - -
Face Velocity fpm 744 882 672 804 577 687 495 588 395 469 - -
Neck Velocity fpm 533 506 455 421 349 -
Ps (in-wg) 0.009 0.017 0.002 0.003 0.006 0.002 0.001 0.001 0.001 0.001
954

Pt (in-wg) 0.022 0.030 0.006 0.007 0.003 0.004 0.002 0.003 0.002 0.002
Throw (ft) 19 23 35 16 21 24 19 23 34 15 19 24 18 22 34 15 18 23 18 22 33 15 18 23 18 21 33 15 18 23
NC < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 826 980 746 893 641 763 549 654 439 521 368 439
Neck Velocity fpm 592 562 505 467 388 331
Ps (in-wg) 0.017 0.031 0.007 0.013 0.012 0.009 0.001 0.001 0.001 0.001 0.000 0.000
1060

Pt (in-wg) 0.038 0.052 0.016 0.021 0.013 0.017 0.002 0.003 0.002 0.002 0.000 0.000
Throw (ft) 21 26 36 16 19 24 21 25 36 16 20 24 20 25 35 16 19 24 20 24 34 16 19 23 19 23 33 15 18 23 18 21 32 14 17 22
NC < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 992 1177 896 1071 769 916 659 784 526 625 441 526
Neck Velocity fpm 710 674 606 561 465 397
Ps (in-wg) 0.119 0.044 0.022 0.039 0.017 0.030 0.007 0.011 0.001 0.001 0.000 0.000
1272

Pt (in-wg) 0.049 0.069 0.047 0.064 0.038 0.051 0.015 0.020 0.003 0.003 0.001 0.001
Throw (ft) 25 29 40 18 21 25 24 29 39 17 21 25 24 28 38 17 20 24 24 27 38 16 19 24 23 27 37 16 19 23 22 24 34 15 18 22
NC < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 1157 1373 1045 1250 897 1069 769 915 614 729 515 614
Neck Velocity fpm 828 787 707 654 543 464
Ps (in-wg) 0.188 0.060 0.029 0.053 0.022 0.040 0.019 0.033 0.001 0.002 0.000 0.000
1484

Pt (in-wg) 0.069 0.096 0.065 0.090 0.048 0.066 0.044 0.059 0.003 0.004 0.001 0.001
Throw (ft) 28 34 45 19 23 27 28 34 44 19 23 27 27 33 43 18 22 26 27 33 43 18 21 26 26 32 42 17 21 25 24 30 39 16 19 23
NC < 15 22 < 15 21 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15
Face Velocity fpm 1322 1569 1194 1429 1026 1221 879 1046 702 833 588 702
Neck Velocity fpm 947 899 808 748 620 530
Ps (in-wg) 0.043 0.079 0.038 0.070 0.029 0.052 0.024 0.044 0.009 0.017 0.000 0.001
1696

Pt (in-wg) 0.095 0.131 0.085 0.117 0.065 0.089 0.061 0.081 0.020 0.027 0.001 0.001
Throw (ft) 30 37 49 21 25 29 28 38 49 21 24 29 29 37 48 20 23 28 29 37 48 23 23 27 28 36 47 19 23 27 27 34 45 18 22 25
NC 20 27 18 25 < 15 20 < 15 < 15 < 15 < 15 < 15 < 15

See notes on page C-22 Contd...

C-28
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)
36 x 6 42 x 6
Size 30 x 8 36 x 8
AIR FLOW (CFM)

(in x in 20 x 10 24 x 10
18 x 12 20 x 12 24 x 12
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (ft2) 1.270 1.346 1.518 1.572 1.830
Frea Area (ft2) 0.829 0.700 0.915 0.764 1.044 0.872 1.109 0.936 1.302 1.098
Face Velocity fpm 2338 2769 2118 2535 1856 2222 1748 2069 1488 1765
Neck Velocity fpm 1525 1440 1277 1233 1065
Ps (in-wg) 0.154 0.279 0.124 0.225 0.090 0.160 0.078 0.141 0.055 0.099
1908

Pt (in-wg) 0.297 0.422 0.241 0.341 0.204 0.256 0.168 0.231 0.124 0.168
Throw (ft) 34 43 55 25 28 32 34 43 55 25 28 32 34 41 54 24 27 32 33 41 54 24 27 30 33 40 53 23 26 30
NC 41 48 38 44 33 39 30 37 24 31
Face Velocity fpm - - 2353 2817 2062 2469 1942 2299 1653 1961
Neck Velocity fpm - 1600 1418 1370 1183
Ps (in-wg) - - 0.152 0.279 0.101 0.199 0.097 0.175 0.064 0.123
2120

Pt (in-wg) - - 0.294 0.421 0.244 0.316 0.212 0.283 0.147 0.206

Throw (ft) - - - - - - 36 45 57 24 30 34 36 43 56 26 29 33 35 43 56 26 29 32 35 42 55 25 28 32
NC - - 41 47 36 42 34 40 28 34
Face Velocity fpm - - - - - - 2330 2759 1984 2353
Neck Velocity fpm - - - 1644 1420
Ps (in-wg) - - - - - - 0.139 0.252 0.089 0.177
2544

Pt (in-wg) - - - - - - 0.312 0.371 0.202 0.290

Throw (ft) - - - - - - - - - - - - - - - - - - 37 47 59 28 31 36 37 46 58 27 31 35
NC - - - - - - 39 46 33 40
Face Velocity fpm - - - - - - - - 2314 2745
Neck Velocity fpm - - - - 1657
Ps (in-wg) - - - - - - - - 0.132 0.240
2968

Pt (in-wg) - - - - - - - - 0.281 0.388

Throw (ft) - - - - - - - - - - - - - - - - - - - - - - - - 39 49 60 30 35 38
NC - - - - - - - - 38 45
Face Velocity fpm - - - - - - - - - -
Neck Velocity fpm - - - - -
Ps (in-wg) - - - - - - - - - -
3392

Pt (in-wg) - - - - - - - - - -
Throw (ft) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
NC - - - - - - - - - -

See notes on page C-22 Contd...

C-29
 GRILLES & REGISTERS

SUPPLY AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)

Size 42 x 8
AIR FLOW (CFM)

(in x in 30 x 10 36 x 10 42 x 10
30 x 12 36 x 12 42 x 12
Deflection 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­ 00­ 450­
Neck Area (ft2) 1.916 2.131 2.304 2.777 3.251
Frea Area (ft2) 1.442 1.205 1.679 1.410 1.959 1.647 2.454 2.067 2.928 2.454
Face Velocity fpm 1343 1607 1154 1374 989 1176 790 938 662 790
Neck Velocity fpm 1011 909 841 698 596
Ps (in-wg) 0.049 0.088 0.037 0.066 0.031 0.056 0.020 0.037 0.008 0.015
1908

Pt (in-wg) 0.107 0.146 0.084 0.114 0.079 0.103 0.047 0.063 0.020 0.027
Throw (ft) 31 40 53 22 26 30 32 40 52 22 25 29 31 39 52 25 25 28 31 39 550 20 25 24 31 37 49 20 23 26
NC 22 29 17 24 < 15 21 < 15 < 15 < 15 < 15
Face Velocity fpm 1493 1786 1282 1527 1099 1307 877 1042 735 877
Neck Velocity fpm 1124 1010 935 775 662
Ps (in-wg) 0.062 0.110 0.049 0.082 0.038 0.069 0.025 0.046 0.017 0.031
2120

Pt (in-wg) 0.134 0.182 0.108 0.141 0.094 0.125 0.060 0.080 0.041 0.055
Throw (ft) 34 42 55 24 27 32 33 42 55 24 27 31 33 41 54 23 27 30 33 41 53 22 26 24 33 40 52 21 25 28
NC 26 32 21 27 18 24 < 15 < 15 < 15 < 15
Face Velocity fpm 1791 2143 1518 1832 1319 1569 1053 1250 882 1053
Neck Velocity fpm 1348 1212 1121 930 795
Ps (in-wg) 0.090 0.157 0.073 0.118 0.054 0.099 0.036 0.065 0.025 0.044
2544

Pt (in-wg) 0.159 0.263 0.158 0.203 0.125 0.169 0.085 0.115 0.060 0.079
Throw (ft) 36 46 58 26 30 34 35 46 58 26 29 34 35 45 57 25 29 34 35 44 57 25 28 33 35 43 56 24 28 33
NC 31 38 26 32 23 30 < 15 22 < 15 < 15
Face Velocity fpm 2090 2500 1795 2137 1538 1830 1228 1458 1029 1228
Neck Velocity fpm 1573 1414 1308 1085 927
Ps (in-wg) 0.117 0.214 0.089 0.161 0.074 0.134 0.049 0.087 0.033 0.061
2968

Pt (in-wg) 0.199 0.357 0.197 0.275 0.222 0.232 0.121 0.160 0.084 0.112
Throw (ft) 39 49 60 29 33 37 39 48 60 28 32 37 38 47 59 28 31 37 38 47 59 27 31 36 37 46 58 26 30 36
NC 36 43 35 37 28 35 21 27 < 15 20
Face Velocity fpm 2388 2857 2051 2443 1758 2092 1404 1667 1177 1404
Neck Velocity fpm 1798 1616 1495 1240 1060
Ps (in-wg) 0.154 0.279 0.115 0.210 0.096 0.175 0.064 0.114 0.044 0.079
3392

Pt (in-wg) 0.287 0.462 0.259 0.361 0.293 0.306 0.158 0.209 0.112 0.147
Throw (ft) 41 52 63 31 37 40 40 51 62 31 36 40 40 50 61 31 35 39 40 50 61 30 35 39 39 49 60 29 34 38
NC 40 47 40 42 32 39 25 31 19 24

See notes on page C-22

C-30
 RETURN AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)
12 X 6 9X6 20 X 6 24 X 6 30 X 6 36 X 6 42 X 6
12 X 8 18 X 8 20 X 8 24 X 8 30 X 8 36 X 8 42 X 8
AIR FLOW Size (in x in)
12 X 10 18 X 10 20 X 10 24 X 10 30 X 10 36 X 10 42 X 10
(CFM)
12 X 12 18 X 12 20 X 12 24 X 12 30 X 12 36 X 12 42 X 12
Neck Area (ft2­) 0.441 0.592 0.667 0.743 0.893 1.001 1.120 1.206 1.270 1.346 1.518 1.572 1.830 1.916 2.131 2.304 2.777 3.251
Neck Velocity (fpm) 488 364 323 290 241 - - - - - - - - - - - - -
Pv (in-wg) 0.016 0.008 0.006 0.005 0.003 - - - - - - - - - - - - -
200
Ps (in-wg) 0.034 0.026 0.023 0.021 0.018 - - - - - - - - - - - - -
NC < 15 < 15 < 15 < 15 < 15 - - - - - - - - - - - - -
Neck Velocity (fpm) 610 455 403 362 301 269 - - - - - - - - - - - -
Pv (in-wg) 0.024 0.013 0.010 0.008 0.005 0.004 - - - - - - - - - - - -
270
Ps (in-wg) 0.048 0.035 0.029 0.025 0.021 0.019 - - - - - - - - - - - -
NC < 15 < 15 < 15 < 15 < 15 < 15 - - - - - - - - - - - -
Neck Velocity (fpm) 732 545 484 435 361 323 288 268 - - - - - - - - - -
Pv (in-wg) 0.035 0.019 0.014 0.011 0.008 0.006 0.005 0.004 - - - - - - - - - -
320
Ps (in-wg) 0.070 0.046 0.038 0.032 0.025 0.021 0.018 0.016 - - - - - - - - - -
NC 18 < 15 < 15 < 15 < 15 < 15 < 15 < 15 - - - - - - - - - -
Neck Velocity (fpm) 854 636 565 507 422 376 337 313 297 280 - - - - - - - -
Pv (in-wg) 0.048 0.026 0.020 0.015 0.010 0.008 0.007 0.006 0.005 0.005 - - - - - - - -
370
Ps (in-wg) 0.093 0.062 0.044 0.043 0.031 0.026 0.021 0.019 0.017 0.015 - - - - - - - -
NC 25 17 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 - - - - - - - -
Neck Velocity (fpm) 976 727 645 580 482 430 385 357 339 320 284 274 - - - - - -
Pv (in-wg) 0.062 0.034 0.027 0.021 0.014 0.011 0.009 0.008 0.007 0.006 0.005 0.004 - - - - - -
420
Ps (in-wg) 0.120 0.084 0.047 0.046 0.029 0.023 0.018 0.016 0.014 0.012 0.010 0.009 - - - - - -
NC 28 20 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 - - - - - -
Neck Velocity (fpm) 1098 818 726 652 542 484 433 402 381 360 319 308 265 - - - - -
Pv (in-wg) 0.079 0.043 0.034 0.027 0.018 0.014 0.011 0.010 0.009 0.008 0.006 0.006 0.004 - - - - -
480
Ps (in-wg) 0.154 0.106 0.058 0.048 0.034 0.025 0.019 0.017 0.015 0.013 0.010 0.009 0.007 - - - - -
NC 30 24 18 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 - - - - -
Neck Velocity (fpm) 1220 909 806 725 602 538 481 446 424 400 355 342 294 281 253 - - -
Pv (in-wg) 0.097 0.053 0.042 0.034 0.023 0.017 0.013 0.012 0.011 0.009 0.007 0.007 0.005 0.005 0.004 - - -
500
Ps (in-wg) 0.187 0.128 0.075 0.065 0.048 0.034 0.027 0.023 0.021 0.019 0.015 0.014 0.010 0.009 0.008 - - -
NC 33 27 22 18 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 - - -
Neck Velocity (fpm) 1341 1000 887 797 663 591 529 491 466 440 390 377 324 309 278 - - -
Pv (in-wg) 0.118 0.064 0.051 0.041 0.028 0.022 0.016 0.014 0.013 0.011 0.009 0.008 0.006 0.006 0.005 - - -
580
Ps (in-wg) 0.228 0.151 0.091 0.081 0.059 0.040 0.033 0.028 0.026 0.022 0.018 0.017 0.012 0.011 0.009 - - -
NC 37 32 27 23 20 16 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15 - - -
GRILLES & REGISTERS

See notes on page C-22 Contd...

C-31
C-32
RETURN AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)
12 X 6 9X6 20 X 6 24 X 6 30 X 6 36 X 6 42 X 6
12 X 8 18 X 8 20 X 8 24 X 8 30 X 8 36 X 8 42 X 8
AIR FLOW Size (in x in)
12 X 10 18 X 10 20 X 10 24 X 10 30 X 10 36 X 10 42 X 10
(CFM)
12 X 12 18 X 12 20 X 12 24 X 12 30 X 12 36 X 12 42 X 12
Neck Area (ft2­) 0.441 0.592 0.667 0.743 0.893 1.001 1.120 1.206 1.270 1.346 1.518 1.572 1.830 1.916 2.131 2.304 2.777 3.251
Neck Velocity (fpm) 1463 1091 968 870 723 645 577 536 508 480 426 411 353 337 303 280 - -
Pv (in-wg) 0.141 0.076 0.061 0.049 0.033 0.027 0.020 0.017 0.015 0.013 0.011 0.010 0.007 0.007 0.005 0.005
640
Ps (in-wg) 0.273 0.181 0.106 0.096 0.071 0.050 0.037 0.035 0.031 0.027 0.021 0.020 0.014 0.013 0.011 0.054
NC 39 34 30 27 25 18 17 16 15 < 15 < 15 < 15 < 15 < 15 < 15 < 15
Neck Velocity (fpm) 1707 1273 1129 1014 843 753 673 625 593 560 496 479 412 393 354 327 271
Pv (in-wg) 0.191 0.104 0.083 0.066 0.045 0.036 0.029 0.024 0.022 0.018 0.014 0.014 0.010 0.009 0.007 0.006 0.004
740
Ps (in-wg) 0.370 0.252 0.144 0.129 0.097 0.072 0.051 0.047 0.040 0.040 0.040 0.036 0.028 0.018 7.026 0.012 0.009
NC 43 38 35 33 30 23 17 16 15 15 15 < 15 < 15 < 15 < 15 < 15 < 15
Neck Velocity (fpm) - 1455 1290 1159 964 860 769 714 678 640 567 548 471 449 404 374 310 265
Pv (in-wg) - 0.135 0.108 0.086 0.059 0.047 0.038 0.033 0.030 0.024 0.019 0.018 0.013 0.012 0.010 0.008 0.006 0.004
850
Ps (in-wg) - 0.330 0.193 0.172 0.131 0.094 0.076 0.068 0.064 0.060 0.060 0.044 0.036 0.022 8.967 0.014 0.010 0.007
NC - 42 38 36 34 28 28 27 26 26 24 21 17 15 < 15 < 15 < 15 < 15
Neck Velocity (fpm) - - 1452 1304 1084 968 865 804 763 720 638 616 529 506 455 421 349 298
Pv (in-wg) - - 0.137 0.109 0.075 0.060 0.047 0.041 0.038 0.032 0.025 0.023 0.016 0.015 0.012 0.010 0.007 0.005
950
Ps (in-wg) - - 0.249 0.225 0.164 0.117 0.099 0.092 0.088 0.076 0.076 0.068 0.052 0.040 0.036 0.020 0.010 0.007
NC - - 43 42 41 40 39 38 36 35 31 28 25 23 20 18 < 15 < 15
Neck Velocity (fpm) - - - 1449 1205 1075 962 893 847 800 709 685 588 562 505 467 388 331
Pv (in-wg) - - - 0.135 0.093 0.074 0.059 0.051 0.047 0.041 0.032 0.029 0.023 0.019 0.015 0.013 0.009 0.007
1000
Ps (in-wg) - - - 0.277 0.204 0.142 0.125 0.108 0.096 0.096 0.092 0.072 0.048 0.044 0.021 0.018 0.012 0.008
NC - - - 44 43 42 41 39 38 36 26 33 31 28 25 20 18 < 15
Neck Velocity (fpm) - - - - - 1290 1154 1071 1017 960 851 822 706 674 606 561 465 397
Pv (in-wg) - - - - - 0.107 0.085 0.074 0.067 0.058 0.046 0.044 0.036 0.028 0.022 0.019 0.013 0.009
1270
Ps (in-wg) - - - - - 0.206 0.160 0.148 0.144 0.144 0.140 0.128 0.112 0.080 0.072 0.044 0.040 0.040
NC - - - - - 41 42 39 39 38 38 35 33 30 28 25 20 18
Neck Velocity (fpm) - - - - - - - - 1186 1120 993 959 824 787 707 654 543 464
Pv (in-wg) - - - - - - - - 0.091 0.079 0.063 0.059 0.044 0.040 0.031 0.026 0.018 0.013
1480
Ps (in-wg) - - - - - - - - 0.176 0.168 0.168 0.128 0.092 0.072 0.060 0.035 0.023 0.015
NC - - - - - - - - 47 45 44 38 35 33 30 28 25 20
Neck Velocity (fpm) - - - - - - - - 1356 1280 1135 1096 941 899 808 748 620 530
Pv (in-wg) - - - - - - - - 0.160 0.103 0.082 0.078 0.057 0.052 0.042 0.036 0.028 0.017
1700
Ps (in-wg) - - - - - - - - 0.210 0.192 0.180 0.120 0.096 0.088 0.080 0.052 0.034 0.025
NC - - - - - - - - 49 47 45 40 37 34 33 30 27 24
GRILLES & REGISTERS

See notes on page C-22 Contd...

 RETURN AIR REGISTERS & GRILLES: SDG, SDR, DDG, DDR, FBG, FBR (IP UNITS)
12 X 6 9X6 20 X 6 24 X 6 30 X 6 36 X 6 42 X 6
12 X 8 18 X 8 20 X 8 24 X 8 30 X 8 36 X 8 42 X 8
AIR FLOW Size (in x in)
12 X 10 18 X 10 20 X 10 24 X 10 30 X 10 36 X 10 42 X 10
(CFM)
12 X 12 18 X 12 20 X 12 24 X 12 30 X 12 36 X 12 42 X 12
Neck Area (ft2­) 0.441 0.592 0.667 0.743 0.893 1.001 1.120 1.206 1.270 1.346 1.518 1.572 1.830 1.916 2.131 2.304 2.777 3.251
Neck Velocity (fpm) - - - - - - - - - - - 1233 1059 1011 909 841 698 596
Pv (in-wg) - - - - - - - - - - - 0.098 0.072 0.066 0.053 0.045 0.040 0.022
1910
Ps (in-wg) - - - - - - - - - - - 0.143 0.106 0.095 0.079 0.069 0.048 0.032
NC - - - - - - - - - - - 41 38 35 34 31 28 25
Neck Velocity (fpm) - - - - - - - - - - - 1370 1176 1124 1010 935 775 662
Pv (in-wg) - - - - - - - - - - - 0.122 0.089 0.082 0.066 0.056 0.050 0.028
2120
Ps (in-wg) -- -- -- -- -- -- -- -- -- -- -- 0.179 0.131 0.121 0.097 0.083 0.059 0.038
NC - - - - - - - - - - - 42 39 38 35 42 30 28
Neck Velocity (fpm) - - - - - - - - - - - 1644 1412 1348 1212 1121 930 795
Pv (in-wg) - - - - - - - - - - - 0.175 0.128 0.118 0.095 0.081 0.071 0.041
2540
Ps (in-wg) -- -- -- -- -- -- -- -- -- -- -- 0.260 0.191 0.177 0.141 0.120 0.081 0.056
NC - - - - - - - - - - - 43 40 39 37 35 32 30
Neck Velocity (fpm) - - - - - - - - - - - - 1647 1573 1414 1308 1085 927
Pv (in-wg) - - - - - - - - - - - - 0.174 0.160 0.129 0.110 0.114 0.054
2970
Ps (in-wg) - - - - - - - - - - - - 0.263 0.237 0.190 0.165 0.108 0.072
NC - - - - - - - - - - - - 42 41 39 37 34 31
Neck Velocity (fpm) - - - - - - - - - - - - - - 1616 1495 1240 1060
Pv (in-wg) - - - - - - - - - - - - - - 0.168 0.143 0.148 0.070
3390
Ps (in-wg) - - - - - - - - - - - - - - 0.251 0.210 0.142 0.099
NC - - - - - - - - - - - - - - 40 39 37 35
Neck Velocity (fpm) - - - - - - - - - - - - - - - 1682 1395 1192
Pv (in-wg) - - - - - - - - - - - - - - - 0.181 0.160 0.091
3820
Ps (in-wg) - - - - - - - - - - - - - - - 0.266 0.181 0.127
NC - - - - - - - - - - - - - - - 41 39 37
Neck Velocity (fpm) - - - - - - - - - - - - - - - - 1550 1325
Pv (in-wg) - - - - - - - - - - - - - - - - 0.198 0.113
4240
Ps (in-wg) - - - - - - - - - - - - - - - - 0.225 0.156
NC - - - - - - - - - - - - - - - - 42 39
Neck Velocity (fpm) - - - - - - - - - - - - - - - - - 1457
Pv (in-wg) - - - - - - - - - - - - - - - - - 0.136
4660
Ps (in-wg) - - - - - - - - - - - - - - - - - 0.189
NC - - - - - - - - - - - - - - - - - 41
GRILLES & REGISTERS

See notes on page C-22

C-33
 GRILLES & REGISTERS

EGG CRATE GRILLES & REGISTERS : ECG & ECR (IP UNITS)
Core Velocity (fpm) 300 400 500 600 700 800 1000 1200 1400 1500
Core Area Nominal Sizes
Velocity Pressure (in-wg) 0.006 0.01 0.016 0.022 0.031 0.04 0.062 0.09 0.122 0.14
(ft2) (in x in)
Negative SP (in-wg) 0.013 0.021 0.034 0.047 0.066 0.085 0.132 0.192 0.26 0.298
7X4 CFM 45 60 75 90 105 120 150 180 210 225
0.15
6X5 NC - - - - - - 22 28 34 37
8X4 6X6 CFM 54 72 90 108 126 144 180 216 252 270
0.18
7X5 NC - - - - - - 34 40 45 47
10 X 4 7X6 CFM 66 88 110 132 154 176 220 264 308 330
0.22
8X5 NC - - - - - - 23 30 36 38
12 X 4 8X6 CFM 82 104 130 156 182 208 260 312 364 390
0.26
10 X 5 NC - - - - - 15 24 31 36 39
14 X 4 CFM 90 120 150 180 210 240 300 360 420 450
0.30
NC - - - - - 16 24 31 37 40
16 X 4 10 X 6 CFM 102 136 170 204 238 272 340 408 476 510
0.34
12 X 5 NC - - - - - 16 25 32 37 40
18 X 4 12 X 6 CFM 117 156 195 234 273 312 390 468 546 585
0.39
14 X 5 8X8 NC - - - - - 17 25 32 38 41
20 X 4 14 X 6 CFM 138 184 230 276 322 368 460 552 644 690
0.46
16 X 5 10 X 8 NC - - - - - 18 26 33 39 41
24 X 4 16 X 6 CFM 156 208 260 312 364 416 520 624 728 780
0.52
18 X 5 NC - - - - - 18 26 33 39 42
28 X 4 18 X 6 10 X 10 CFM 180 240 300 360 420 480 600 720 840 900
0.60
20 X 5 12 X 8 NC - - - - - 19 27 34 40 42
30 X 4 20 X 6 12 X 10 CFM 207 276 345 414 483 552 690 828 966 1035
0.69
24 X 5 14 X 8 NC - - - - - 19 28 34 40 43
36 X 4 22 X 6 14 X 10 CFM 243 324 405 486 567 648 810 972 1134 1215
0.81
28 X 5 16 X 8 NC - - - - - 20 28 35 41 43
40 X 4 26 X 6 16 X 10 CFM 270 360 450 540 630 720 900 1080 1260 1350
0.90
30 X 5 18 X 8 12 X 12 NC - - - - 15 20 29 35 41 44
48 X 4 30 X 6 14 X 12 CFM 321 428 535 642 749 856 1070 1284 1498 1605
1.07
36 X 5 18 X 10 NC - - - - 16 21 29 36 42 45
34 X 6 20 X 10 14 X 14 CFM 354 472 590 708 826 944 1180 1416 1652 1770
1.18
24 X 8 16 X 12 NC - - - - 16 21 30 37 42 45
60 X 4 36 X 6 16 X 14 CFM 402 536 670 804 938 1072 1340 1608 1876 2010
1.34
48 X 5 18 X 12 NC - - - - 17 22 30 37 43 45
72 X 4 24 X 10 18 X 14 CFM 480 640 800 960 1120 1280 1600 1920 2240 2400
1.60
30 X 8 22 X 12 16 X 16 NC - - - - 17 22 31 38 44 46
60 X 5 36 X 8 24 X 12 18 X 16 CFM 540 720 900 1080 1260 1440 1800 2160 2520 2700
1.80
48 X 6 30 X 10 20 X 14 NC - - - - 18 23 31 38 44 47
72 X 5 40 X 8 30 X 12 20 X 16 CFM 624 832 1040 1248 1456 1664 2080 2496 2912 3120
2.08
60 X 6 36 X 10 24 X 14 18 X 18 NC - - - - 18 23 32 39 45 47
72 X 6 32 X 12 24 X 16 CFM 750 980 1225 1470 1750 1960 2450 2940 3430 3675
2.45
48 X 8 26 X 14 20 X 18 NC - - - - 19 24 33 39 45 48
36 X 12 26 X 16 22 X 20 CFM 834 1112 1390 1668 1946 2224 2780 3336 3892 4170
2.78
30 X 14 24 X 18 NC - - - - 20 25 33 40 45 48
60 X 8 40 X 12 30 X 16 24 X 20 CFM 933 1244 1555 1866 2177 2488 3110 3732 4354 4665
3.11
48 X 10 36 X 14 26 X 18 NC - - - - 20 25 33 40 46 49
72 X 8 48 X 12 30 X 18 CFM 1083 1444 1805 2166 2527 2888 3610 4332 5054 5410
3.61
60 X 10 36 X 16 24 X 24 NC - - - - 21 26 34 41 47 49
48 X 14 32 X 20 CFM 1287 1716 2145 2574 3003 3432 4290 5148 6006 6435
4.29
36 X 18 28 X 24 NC - - - 15 21 26 35 42 47 50
72 X 10 36 X 20 CFM 1395 1860 2325 2790 3255 3720 4650 5580 6510 6975
4.65
48 X 16 30 X 24 NC - - - 16 22 27 35 42 48 50
72 X 12 48 X 18 CFM 1674 2232 2790 3348 3906 4464 5580 6696 7812 8370
5.58
60 X 14 36 X 24 NC - - - 16 22 27 36 43 48 51
72 X 14 48 X 20 CFM 1875 2500 3125 3750 4375 5000 6250 7500 8750 9375
6.25
60 X 16 30 X 30 NC - - - 16 22 27 36 43 48 51

See notes on page C-22

C-34
 GRILLES & REGISTERS

PERFORATED GRILLES & REGISTERS: PAG & PAR (IP UNITS)

Core Velocity (fpm) 200 300 400 500 600 700 800 900 1000
Core Area Nominal Sizes
Velocity Pressure (in-wg) 0.002 0.006 0.01 0.016 0.022 0.031 0.04 0.05 0.062
(ft2) (in x in)
Negative SP (in-wg) 0.019 0.043 0.076 0.118 0.171 0.232 0.303 0.384 0.474
7x6 CFM 30 45 60 75 90 105 120 135 150
0.15
6x5 NC - - - 20 25 29 33 36 39
8x4 6x6 CFM 36 54 72 90 108 126 144 162 180
0.18
7x5 NC - - - 20 25 29 33 36 39
10 x 4 7x6 CFM 44 66 88 110 132 154 176 198 220
0.22
8x5 NC - - - 20 25 29 33 36 39
12 x 4 8x6 CFM 52 78 104 130 165 182 208 234 260
0.26
10 x 5 NC - - - 20 25 29 33 36 39
14 x 4 CFM 60 90 120 150 180 210 240 270 300
0.3
NC - - - 20 25 29 33 36 39
16 x 4 10 x 6 CFM 68 102 136 170 204 238 272 306 340
0.34
12 x 5 NC - - - 20 25 29 33 36 39
18 x 4 10 x 6 CFM 78 117 156 195 234 273 312 351 390
0.39
14 x 5 NC - - - 20 25 29 33 36 39
20 x 4 14 x 6 CFM 92 138 184 230 276 322 368 414 460
0.46
16 x 5 10 x 8 NC - - - 20 25 29 33 36 39
24 x 4 16 x 6 CFM 104 156 208 260 312 364 146 468 520
0.52
18 x 5 NC - - - 20 25 29 33 36 39
28 x 4 18 x 6 10 x 10 CFM 120 180 240 300 360 420 480 540 600
0.6
20 x 5 12 x 8 NC - - - 20 25 29 33 36 39
30 x 4 20 x 6 12 x 10 CFM 138 207 276 345 414 483 552 621 690
0.69
24 x 5 14 x 8 NC - - - 20 25 29 33 36 39
36 x 4 22 x 6 14 x 10 CFM 162 243 342 405 486 567 648 729 810
0.81
28 x 5 16 x 8 NC - - - 20 25 29 33 36 39
40 x 4 26 x 6 16 x 10 CFM 180 270 360 450 540 630 720 810 900
0.9
30 x 5 18 x 8 12 x 12 NC - - - 20 25 29 33 36 39
48 x 4 30 x 6 14 x 12 CFM 14 321 428 535 642 749 856 963 1070
1.07
36 x 5 18 x 10 NC - - - 20 25 29 33 36 39
34 x 6 20 x 10 14 x 14 CFM 236 354 472 590 708 826 944 1062 1180
1.18
24 x 8 16 x 12 NC - - - 20 25 29 33 36 39
60 x 4 36 x 6 16 x 14 CFM 268 402 536 670 804 938 1072 1206 1340
1.34
48 x 5 18 x 12 NC - - - 20 25 29 33 36 39
72 x 4 24 x 10 18 x 14 CFM 320 480 640 800 960 1120 1280 1440 1600
1.6
30 x 8 22 x 12 16 x 16 NC - - - 20 25 29 33 36 39
60 x 5 36 x 8 24 x 12 18 x 16 CFM 360 540 720 900 1080 1260 1440 1620 1800
1.8
48 x 6 30 x 10 20 x 14 NC - - - 20 25 29 33 36 39
72 x 5 40 x 8 30 x 12 20 x 16 CFM 416 624 832 1040 1248 1456 1664 1872 2080
2.08
60 x 6 36 x 10 24 x 14 18 x 18 NC - - - 20 25 29 33 36 39
72 x 6 32 x 12 24 x 16 CFM 490 735 980 1225 1470 1715 1960 2205 2450
2.45
48 x 8 26 x 14 20 x 18 NC - - - 20 25 29 33 36 39
36 x 12 26 x 16 22 x 20 CFM 556 834 1112 1390 1668 1946 2224 2502 2780
2.78
30 x 14 24 x 18 NC - - - 20 25 29 33 36 39
60 x 8 40 x 12 30 x 16 24 x 20 CFM 622 933 1244 1555 1866 2177 2488 2799 3110
3.11
48 x 10 36 x 40 26 x 18 NC - - - 20 25 29 33 36 39
72 x 8 48 x 12 30 x 18 CFM 722 1083 1444 1805 2166 2527 2888 3249 3610
3.61
60 x 10 36 x 16 24 x 24 NC - - - 20 25 29 33 36 39
48 x 14 32 x 20 CFM 858 1287 1716 2145 2574 3003 3432 3861 4290
4.29
36 x 18 28 x 24 NC - - - 20 25 29 33 36 39
72 x 10 36 x 20 CFM 930 1395 1860 2325 2790 3255 3720 4185 4650
4.65
48 x 16 30 x 24 NC - - - 20 25 29 33 36 39
72 x 12 48 x 18 CFM 1116 1674 2232 2790 3348 3906 4468 5022 5580
5.58
60 x 14 36 x 24 NC - - - 20 25 29 33 36 39
72 x 14 48 x 20 CFM 1250 1875 2500 3125 3750 4375 5000 5625 6250
6.25
60 x 16 30 x 30 NC - - - 20 25 29 33 36 39
See notes on page C-22
C-35
 GRILLES & REGISTERS

DOOR GRILLES: DG - IP UNITS

Core Velocity (fpm) 100 150 200 250 300 350 400
Core Area Nominal Sizes Velocity Pressure (in-wg) 0.0006 0.001 0.002 0.004 0.006 0.008 0.01
(ft2) (in x in)
Negative SP (in-wg) 0.011 0.026 0.046 0.073 0.104 0.141 0.186
10 x 4 7x6 CFM 25 38 50 63 75 88 100
0.25
8x5 NC - - - - 16 20 24
24 x 4 18 x 5 CFM 50 75 100 125 150 175 200
0.50
16 x 6 NC - - - 20 26 29 32
32 x 4 20 x 6 12 x 10 CFM 75 113 150 188 225 263 300
0.75
26 x 5 16 x 8 NC - - 19 25 30 34 37
28 x 6 16 x 10 CFM 100 150 200 250 300 350 400
1.00
20 x 8 14 x 12 NC - 15 23 29 33 37 41
30 x 8 20 x 12 CFM 150 225 300 375 450 525 600
1.50
24 x 10 16 x 14 NC - 20 28 33 38 42 45
40 x 8 26 x 12 20 x 16 CFM 200 300 400 500 600 650 800
2.00
32 x 10 22 x 14 NC - 24 31 37 42 46 49
40 x 10 28 x 14 22 x 18 CFM 250 375 500 625 750 875 1000
2.50
32 x 12 24 x 16 NC 16 27 34 40 44 48 52
40 x 12 30 x 16 24 x 20 CFM 300 450 600 750 900 1050 1200
3.00
34 x 14 26 x 18 NC 18 29 36 42 47 50 54
38 x 14 30 x 18 24 x 22 CFM 350 525 650 875 1050 1225 1400
3.50
34 x 16 28 x 20 NC 20 31 38 44 48 52 56
38 x 16 32 x 20 26 x 24 CFM 400 600 800 1000 1200 1400 1600
4.00
34 x 18 28 x 22 NC 22 32 40 45 50 54 57
38 x 18 32 x 22 26 x 26 CFM 450 675 900 1125 1350 1575 1800
4.50
34 x 20 28 x 24 NC 23 34 41 47 51 55 59
38 x 20 32 x 24 28 x 28 CFM 500 750 1000 1250 1500 1750 2000
5.00
34 x 22 30 x 26 NC 25 35 42 48 53 57 60
See notes on page C-22

C-36
LINEAR BAR D
GRILLE
We Care For The Air You Breathe

www.flowtechind.com Part of
 LINEAR BAR GRILLE

Linear Bar Grille Index

APPLICATION D1

PRODUCT FEATURES D1

SINGLE DEFLECTION LINEAR BAR GRILLE 15O (SDLBG-TYPE A) & SINGLE DEFLECTION LINEAR BAR REGISTER 15O(SDLBR-TYPE A) D2

SINGLE DEFLECTION LINEAR BAR GRILLE 15O (SDLBG-TYPE B) & SINGLE DEFLECTION LINEAR BAR REGISTER 15O(SDLBR-TYPE B) D2

SINGLE DEFLECTION LINEAR BAR GRILLE (SDLBG) & SINGLE DEFLECTION LINEAR BAR REGISTER (SDLBR) D3

DOUBLE DEFLECTION LINEAR BAR GRILLE (DDLBG) & DOUBLE DEFLECTION LINEAR BAR REGISTER (DDLBR) D3

ACCESSORIES D4

MOUNTING OPTIONS D4

FINISH OPTIONS D4

ORDERING SYSTEM D5

GENERAL NOTES D5

TEST REPORTS D5

PERFORMANCE DATA - SI UNITS - NOTES, SYMBOLS, CONDITIONS D6

PERFORMANCE DATA: DOUBLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: DDLBG & DDLBR - 0° DEFLECTION BLADES (SI UNITS) D7

PERFORMANCE DATA: DOUBLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: DDLBG & DDLBR - 15° DEFLECTION BLADES (SI UNITS) D8

PERFORMANCE DATA: SINGLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: SDLBG & SDLBR (SI UNITS) D9

PERFORMANCE DATA - IP UNITS - NOTES, SYMBOLS, CONDITIONS D10

PERFORMANCE DATA: DOUBLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: DDLBG & DDLBR - 0° DEFLECTION BLADES (IP UNITS) D11

PERFORMANCE DATA: DOUBLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: DDLBG & DDLBR - 15° DEFLECTION BLADES (IP UNITS) D12

PERFORMANCE DATA: SINGLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: SDLBG & SDLBR (IP UNITS) D13
 LINEAR BAR GRILLE

APPLICATION PRODUCT FEATURES

FLOWTECH Linear Bar Grille (LBG) is a side wall grille with a Material:
combination of fixed profile horizontal blades in front and Frame and bar blades are made of extruded aluminium alloy
adjustable vertical blades in rear as an option. 6063 to T6 Heat Treatment.
With its high capacity and pleasant aesthetics FLOWTECH The Opposed Blades Damper is also extruded aluminium alloy
Linear Bar Grilles & Registers are commonly used in relatively 6063 /T6.
large spaces with double voids such as Domes, Open Lobbies,
Standard Widths:
Malls, Atriums, and Building Entrances, where both these
features are required. Linear Bar Grilles / Registers can be supplied in any of the
following standard widths:
FLOWTECH Linear Bar Grilles can also be used as a conventional
supply and return grille or as a combination of both. Thereof, • 100 mm (4-inches) • 150 mm (6-inches)
blind dummy segments can be ordered to integrate in the • 200 mm (8-inches) • 250 mm (10-inches)
decorative outlook of the whole wall. • 300 mm (12-inches)
In FLOWTECH DDLBR & DDLBG vertical rear blades are used Non-standard sizes can be ordered to suit the designer
for directional air flow control. Typically, these blades can be specifications.
adjusted to achieve the required air distribution pattern.
Bar Blade Deflection:

1. Zero Deflection Arrangement : (4mm)

No deflection to air flow direction

2. Zero Deflection Arrangement : (6.4mm)

No deflection to air flow direction

3. Single Deflection Arrangement:

The air flow is deflected 15O to one side

Curve Bar Grille

Bar Grille can be supplied as a wall type curve with a mini-
mum radius of 1meter. Our technician will assist in taking site
measurements for special curvatures.

Curve Segments
Curved Segments are available for sidewall curves, CS-A and
CS-B, with a minimum radius of curvature of 1000mm.
For special installations, our technician can visit the project
site and take the actual measurements to ensure a perfect fit.

Opposed Blades Damper:

FLOWTECH OBD is fixed to the rear frame of LBR by means of
“S” clamp for ease of removal and rigid construction.
To adjust the OBD opening, turn the adjustment screw available
Curved Linear Bar Grille (CS-A) Curved Linear Bar Grille (CS-B)
at the front face of the register (Clockwise to Open / Counter
Clockwise to Close).
D-1
 LINEAR BAR GRILLE

SINGLE DEFLECTION LINEAR BAR GRILLE 15O - SDLBG - TYPE A &

SINGLE DEFLECTION LINEAR BAR REGISTER 15O - SDLBR - TYPE A
The supply linear bar grille is a wall mounted supply grille
used in cooling, heating or air ventilation applications.
The standard front blade width is 5.5mm with cente to center
17 mm.
The supply linear bar grille is composed of a set of fixed
horizontal straight bars in front face and individually adjustable
vertical deflectors in the rear to control air flow pattern. Both
manufactured from extruded aluminium sections.
Frames and blades are made of extruded aluminium alloy
6063 to T6 Heat Treatment.
Flanges are available in 10, 13, 20, 25 and 30 mm width.
OBD are easily removable and attached to the frame by means
of (S) clips to ensure tight grip and maximum flexibility. The
damper is made of extruded aluminium bars. The damper
opening is easily adjusted by means of a control lever that is
driven by a screw driver from the front face of the register.

SINGLE DEFLECTION LINEAR BAR GRILLE 15O - SDLBG - TYPE B &

SINGLE DEFLECTION LINEAR BAR REGISTER 15O - SDLBR- TYPE B
The return linear bar grille is a wall mounted grille, used as
an exhaust or return in cooling, heating or air ventilation
applications.

The standard front blade width is 5.5 mm with center to

center 12.5mm.
The return linear bar grille is composed of a set of fixed
horizontal straight bars attached to a frame, both manufactured
from extruded aluminium sections.
Frames and blades are made of extruded aluminium alloy
6063 to T6 Heat Treatment.
Flanges are available in 10, 13, 20, 25 and 30mm width.
OBD are easily removable and attached to the frame by
means of (S) clips to ensure tight grip and maximum flexibility.
The damper is made of extruded aluminium bars. The damp-
er opening is easily adjusted by means of a control lever that
is driven by a screw driver from the front face of the register.

D-2
 LINEAR BAR GRILLE

SINGLE DEFLECTION LINEAR BAR GRILLE (SDLBG) & SINGLE DEFLECTION LINEAR BAR REGISTER (SDLBR)
The return linear bar grille is a wall mounted grille, used as
an exhaust or return in cooling, heating or air ventilation
applications.
The standard front blade width is 4mm whereas a 6.4mm
blade also is available with center to center 12.5mm.
The return linear bar grille is composed of a set of fixed hor-
izontal straight bars attached to a frame, both manufactured
from extruded aluminium sections.
Frames and blades are made of extruded aluminium alloy
6063 to T6 Heat Treatment.
Flanges are available in 10, 13, 20, 25 and 30mm width.
OBD are easily removable and attached to the frame by
means of (S) clips to ensure tight grip and maximum flexi-
bility. The damper is made of extruded aluminium bars. The
damper opening is easily adjusted by means of a control
lever that is driven by a screw driver from the front face of
the register.

DOUBLE DEFLECTION LINEAR BAR GRILLE (DDLBG) & DOUBLE DEFLECTION LINEAR BAR REGISTER (DDLBR)

The supply linear bar grille is a wall mounted supply grille

used in cooling, heating or air ventilation applications.
The standard front blade width is 4mm where as a 6.4mm
blade also is available with center to center 12.5mm.
The supply linear bar grille is composed of a set of fixed
horizontal straight bars in front face and individually adjustable
vertical deflectors in the rear to control air flow pattern. Both
manufactured from extruded aluminium sections.
Flanges are available in 13, 20, 25 and 30 mm width.
OBD are easily removable and attached to the frame by means
of (S) clips to ensure tight grip and maximum flexibility. The
damper is made of extruded aluminium bars. The damper
opening is easily adjusted by means of a control lever that is
driven by a screw driver from the front face of the register.

D-3
 LINEAR BAR GRILLE

ACCESSORIES MOUNTING OPTIONS

Corner Pieces are available for all standard sizes. Site Fixing options are Concealed Spring Fixing (CSF) or Visible
measurements are preferred to ensure a perfect fit. Screw Fixing (VSF)

Concealed Type Fixing - Wall Only (CSF)

Ceiling Mounted Corner 90O (CP1)

Visible Screw Fixing - Wall or Ceiling (VSF)

FINISH OPTIONS
Ceiling Mounted Corner > 90O (CP2) Available in Powder Coated RAL 9010 or 9016 as standard.

Other powder coated finishes are available upon request.

Wall Mounted Corner - Inside Face (CP3)

Wall Mounted Corner - Outside Face (CP4)

D-4
 LINEAR BAR GRILLE

ORDERING SYSTEM
A X B Ordering Example
DDLBR - 0° - 1200mm x 300mm - 9016
RAL Code Color Stands for Double Deflection Linear Bar
Length in mm or inch
Register 0° angle deflection, 300mm wide
and 1200mm long, with powder coated
Length in mm or inch RAL 9016

0° Deflection
15° Deflection Notes:
DDLBG : Double Deflection Linear Bar Grille
For Curved Segments, remark of curvature
DDLBR : Double Deflection Linear Bar Register and plan of curvature shall be included in
SDLBG : Single Deflection Linear Bar Grille order. (Actual on-site measurements are
SDLBR : Single Deflection Linear Bar Register required.)

GENERAL NOTES
Pages onwards give performance data for all models and variants, 5. NC and Pressure values shown, are based on a complete
and unless otherwise stated the following general notes apply: unit with an opposed blade in the fully open position for the
supply register and without damper for the return grille.
1. Throws shown are to three terminal velocity of 0.25m/s, The damper should only be used for fine balancing, as for
0.50m/s, 0.75m/s, (50fpm, 100fpm, 150fpm) with supply air at every doubling of pressure there is a resulting increase in
conditions with max ∆T = 10k cooling. the noise level of +9dB for supply, or +5dB for exhaust.
2. For standard room height of 2.75 metres, throws should 6. Models with reduced necks. There is a ‘dilution effect’ on
be taken as the distance to the nearest wall (minimum plan performance for these models, as the air tends to spread
dimension, MPD). behind the core, reducing throws by up to 20%, depending on
3. To avoid air flow ‘dumping’ on cooling cycles at the grille the relationship between the neck size and the base diffuser
core, it is advisable to ensure that the neck velocities do not size. For more information, please check with the factory.
drop below 0.75m/s (150fpm).
7. The following tables include the results of test conduct-
4. The acoustic data were tested in accordance to ASHRAE ed on samples of air terminals. The test results include
70-1991 standard. The octave band sound power levels ob- Noise Criteria (NC), static pressure versus air flow, throw
tained were plotted to determine the point of tangency with and effective area. Extrapolation was used to obtain the
the highest rank Noise Criteria curve (NC) to establish the NC. performance for other sizes and other parameters within
the range of products mentioned above.
Noise Criteria ratings were determined by subtracting room
absorption of 10dB from the sound power level data. Test method included in Report.

TEST REPORTS

D-5
 LINEAR BAR GRILLE

PERFORMANCE DATA - SI UNITS

Symbols Notes
L/sec : Air Volume in Litres per second. The large throw values are based on the minimum terminal
velocity of 0.25 m/sec.
Af : Effective free area in square meters.
The middle throw values are based on the medium terminal
Vf : Face Velocity in meters per second.
velocity of 0.50 m/sec.
Ak : Neck Area in square meters.
The small throw values are based on the maximum terminal
Vk : Neck Velocity in meters per second. velocity of 0.75 m/sec.
Ps : Static pressure in Pascal.
Conditions
Pv : Velocity pressure in Pascal.
• Supply or Return as indicated.
Pt : Total pressure in Pascal. • Noise Criteria values are based on (10dB) room attenuation.
Th : Throw in meters. • Damper is fully open.
NC : Noise Criteria. • Maximum room height = 4.0m
• Maximum Cooling @ ∆T = 10K

NOTES

D-6
 LINEAR BAR GRILLE

DOUBLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: DDLBG & DDLBR - 0° DEFLECTION BLADES (SI UNITS)

Air Flow Neck Face Pt Throw @ (0.25/0.50/0.75)

Width NC
(L/S) / LM Velocity (m/s) Velocity (m/s) (Pa) (m/s)
50 0.5 0.8 2 4.8 2.9 2 <15
100 1.1 1.6 4 6 3.9 2.9 <15
150 1.6 2.4 7 6.8 4.7 3.5 <15
100 200 2.2 3.2 11 7.7 5.4 4.2 <15
Ak = 0.090 250 2.7 4.0 16 8.5 5.9 4.5 20
Af = 0.061 300 3.3 4.9 21 9.4 6.5 5 25
350 3.8 5.7 28 10.3 7.2 5.2 29
400 4.4 6.5 44 10.7 7.6 5.7 36
450 5.5 8.2 63 11.5 8.7 6.9 44
150 1.0 1.5 1 6.7 4.6 2.7 <15
200 1.4 2.1 2 6.9 5.1 3.6 <15
250 1.7 2.6 3 7.8 5.6 4.4 <15
150 300 2.1 3.1 4 8.6 6.2 4.9 <15
Ak = 0.140 350 2.5 3.6 5 9.9 7.1 5 17
Af = 0.095 400 2.8 4.1 8 10.1 7.4 5.3 23
450 3.5 5.2 12 10.8 8.1 6.5 32
500 4.2 6.3 17 11.5 9.5 7.8 37
550 5 7.3 20 12.9 10.7 9.5 40
150 0.7 1.4 - 6.2 4.4 2.5 <15
200 1.0 1.8 1 6.7 4.9 2.8 <15
250 1.3 2.3 2 7.5 5.1 3.9 <15
300 1.5 2.8 3 7.9 5.9 4.1 <15
200
350 1.8 3.2 4 9.1 6.9 4.5 <15
Ak = 0.190 400 2.1 3.7 8 9.5 7.1 4.9 <15
Ak = 0.107 450 2.6 4.6 12 9.9 7.9 5.9 24
500 3.1 5.6 22 10.5 9 7.1 30
550 3.9 7.0 30 13 10.7 9.6 35
600 4.7 8.4 44 14.2 11.7 10.5 39
200 0.8 1.2 1 6.5 4.3 2.7 <15
250 1.0 1.6 2 7.8 4.9 3.8 <15
300 1.2 1.9 2 7.2 5.3 4 <15
350 1.4 2.2 3 8.9 6.8 4.1 <15
250 400 1.6 2.5 6 9.1 6.9 4.6 17
Ak = 0.240 450 2.0 3.2 10 9.3 7.2 5.1 20
Af = 0.156 500 2.5 3.8 14 10.1 8.2 6.9 22
550 3.1 4.8 22 12.5 10.1 8.5 30
600 3.7 5.7 31 13.6 10.6 9.5 35
650 4.3 6.7 38 15.1 12 10.7 39
700 5 7.6 44 17.4 13.4 11.6 41
150 0.5 0.8 - 5.6 2.2 1.1 <15
200 0.6 1.1 - 5.9 3.9 2.1 <15
250 0.8 1.4 - 6.5 4.1 2.9 <15
300 1.0 1.7 1 6.9 4.8 3.5 <15
350 1.2 2.0 1 7.9 5.9 3.8 <15
300 400 1.3 2.3 4 8.5 6.5 4.3 <15
Ak = 0.290 450 1.7 2.9 6 9.1 7 4.9 <15
Af = 0.172 500 1.0 3.4 10 9.8 7.9 5.8 19
550 2.5 4.3 15 11.4 8.7 7.9 24
600 3.1 5.2 19 12.7 9.8 8.9 28
650 3.6 6.1 25 14 11 9.5 31
700 4.1 6.9 34 15.4 12.2 10.4 36
750 4.8 8.1 45 16.7 14.5 12.5 41
See notes on page D-6
D-7
 LINEAR BAR GRILLE

DOUBLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: DDLBG & DDLBR - 15° DEFLECTION BLADES (SI UNITS)

Neck Face
Air Flow Pt Throw @ (0.25/0.50/0.75)
Width Velocity Velocity NC
(L/S) / LM (Pa) (m/s)
(m/s) (m/s)
50 0.5 0.9 2 2.4 1.5 0.6 <15
100 1.1 1.8 7 3.1 1.9 1.0 <15
150 1.7 2.7 15 4.2 2.6 1.7 <15
100 200 2.2 3.6 26 5.4 3.9 2.8 17
Ak = 0.090 250 2.7 4.5 41 6.4 4.9 3.2 24
Af = 0.056 300 3.3 5.4 59 7.3 5.7 3.8 31
350 3.9 6.3 80 8.2 6.2 4.3 36
400 4.4 7.2 104 8.7 6.6 4.8 40
500 5.5 9.0 163 9.6 7.5 5.7 45
150 5.5 8.9 173 9.1 1.9 1.6 <15
200 1.5 2.6 9 4.1 2.7 1.8 <15
250 1.8 3.3 14 4.9 3.9 2.0 20
150 300 2.1 4.0 20 5.8 4.5 2.6 26
Ak = 0.140 350 2.5 4.7 27 6.8 5.4 3.4 32
Af = 0.075 400 2.9 5.3 35 7.4 5.9 4.1 35
500 3.6 6.7 55 8.2 6.3 4.7 42
600 4.3 8.0 80 9.2 7.0 5.1 48
700 5.0 9.3 108 10.0 7.8 5.9 54
150 0.8 1.6 2 3.8 2.4 1.3 <15
200 1.0 2.1 3 6.0 3.8 1.9 <15
250 1.3 2.6 5 6.9 4.6 2.3 <15
200 300 1.6 3.2 7 7.6 5.5 3.2 <15
Ak = 0.190 350 1.8 3.7 9 8.5 6.4 4.3 21
Ak = 0.094 400 2.1 4.2 12 8.9 6.8 4.7 27
500 2.6 5.3 19 9.6 7.5 5.4 33
600 3.2 6.4 27 10.3 8.1 6.0 38
800 4.2 8.6 48 11.3 9.1 7.0 43
150 0.6 1.2 1 3.2 1.7 1.0 <15
200 0.8 1.6 2 4.5 2.5 1.6 <15
250 1.1 2.0 2 5.5 2.9 2.0 <15
250 300 1.3 2.4 4 6.3 3.6 2.6 <15
Ak = 0.240 350 1.5 2.8 5 7.1 4.4 3.4 <15
Af = 0.124 400 1.7 3.2 6 7.7 5.0 4.1 <15
500 2.1 4.0 10 8.4 5.7 4.8 20
600 2.5 4.9 14 9.0 6.3 5.4 26
800 3.3 6.5 25 10.0 7.7 6.4 36
150 0.5 1.1 1 2.6 1.4 0.8 <15
200 0.7 1.4 1 3.5 2.5 1.6 <15
250 0.9 1.7 2 4.3 3.1 2.0 <15
300 1.0 2.0 3 5.3 3.6 2.6 <15
300
350 1.2 2.3 3 6.5 4.3 3.2 <15
Ak = 0.290 400 1.4 2.7 4 7.1 4.7 3.5 16
Af = 0.149 600 2.1 4.0 10 8.1 5.7 4.5 29
800 2.8 5.4 18 9.0 6.9 5.5 38
944 3.3 6.4 2.34 9.8 7.6 6.4 43
1000 3.5 6.8 27 10.2 8.0 6.7 45

See notes on page D-6

D-8
 LINEAR BAR GRILLE

SINGLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: SDLBG & SDLBR (SI UNITS)

Width Air Flow (L/S) / LM Pt (Pa) NC

100 3 20
150 8 23
75 200 15 26
250 24 30
300 29 33
100 3 16
150 6 21
200 12 25
100
250 20 28
300 26 30
350 35 32
200 3 <15
250 6 20
300 9 26
150
350 13 30
400 17 35
450 21 39
200 3 18
300 6 24
400 12 28
200
500 20 30
600 26 33
700 35 34
300 4 <15
400 8 18
500 12 23
250
600 18 35
700 24 37
900 39 43
300 3 <15
400 3 18
500 6 23
300
600 9 35
700 13 37
900 22 43

See notes on page D-6

D-9
 LINEAR BAR GRILLE

PERFORMANCE DATA - IP UNITS

Symbols Conditions
CFM : Air Volume in cubic feet per minute • Supply or Return as indicated.
Af : Effective free area in square feet / per L. Ft. • Noise Criteria values are based on (10dB) room
attenuation.
Vf : Face Velocity in feet per minute
• Damper is fully open.
Ak : Neck Area in square feet / per L. Ft
• Maximum room height = 4.0m
Vk : Neck Velocity in feet per minute
• Maximum Cooling @ ∆T = 10K
Pt : Total Pressure in inches water gauge • Correction on noise criteria NC
Th : Throw in feet L = 3 feet correction + 4db
NC : Noise Criteria. L = 6 feet correction + 6db
L = 10 feet correction + 9db
Notes
The large throw values are based on the minimum terminal
velocity of 50 fpm
The middle throw values are based on the medium terminal
velocity of 100 fpm
The small throw values are based on the maximum terminal
velocity of 150 fpm

NOTES

D-10
 LINEAR BAR GRILLE

DOUBLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: DDLBG & DDLBR - 0° DEFLECTION BLADES (IP UNITS)

Width Air Flow (CFM / LFT) Vk (FPM) Vf (FPM) Pt (in-wg) Throw @ (50/100/150) FPM NC
32 111 164 0.007 16 10 7 <15
65 222 328 0.017 20 13 10 <15
97 333 492 0.029 23 16 12 <15
4 129 444 656 0.044 25 18 14 <15
Ak = 0.300 162 556 820 0.063 28 19 15 20
Af = 0.200 194 667 984 0.086 31 21 16 25
226 778 1148 0.111 34 24 17 29
258 889 1312 0.177 35 25 19 36
323 1111 1639 0.254 38 28 23 44
97 214 316 0.004 22 15 9 <15
129 286 421 0.008 23 17 12 <15
162 357 526 0.012 26 19 15 <15
6 194 429 632 0.016 28 20 16 <15
Ak = 0.467 226 500 737 0.020 33 23 16 17
Af = 0.312 258 571 842 0.032 33 24 17 23
323 714 1053 0.048 35 27 21 32
388 857 1263 0.069 38 31 26 37
452 1000 1474 0.080 42 35 31 40
97 158 280 - 20 14 8 <15
129 211 374 0.004 22 16 9 <15
162 263 467 0.008 25 17 13 <15
194 316 561 0.012 26 19 14 <15
8
226 368 654 0.016 30 23 15 <15
Ak = 0.633 258 421 748 0.032 31 23 16 <15
Ak = 0.350 323 526 935 0.048 33 26 19 24
388 632 1122 0.088 35 30 23 30
485 790 1402 0.120 43 35 32 35
582 947 1682 0.177 47 38 35 39
97 125 192 - 20 10 5 <15
129 167 256 0.004 21 14 9 <15
162 208 321 0.006 26 16 13 <15
194 250 385 0.009 24 18 13 <15
226 292 449 0.012 29 22 14 <15
10
258 333 513 0.024 30 23 15 17
Ak = 0.800 323 417 641 0.040 31 24 17 22
Af = 0.512 388 500 769 0.056 33 27 23 24
485 625 962 0.087 41 33 28 30
582 750 1154 0.125 45 35 31 35
678 875 1346 0.153 50 39 35 39
775 1000 1539 0.178 57 44 38 41
97 103 174 - 18 7 4 <15
129 138 233 - 19 13 7 <15
162 172 291 - 21 14 10 <15
194 207 349 0.004 23 16 12 <15
226 241 407 0.004 26 19 13 <15
12 258 276 465 0.018 28 21 14 <15
Ak = 0.967 323 345 581 0.024 30 23 16 <15
Af = 0.560 388 414 698 0.040 32 26 19 19
485 517 872 0.058 37 29 26 24
582 621 1047 0.078 42 32 29 28
678 724 1221 0.101 46 36 31 31
775 828 1395 0.138 51 40 34 36
905 966 1628 0.179 55 48 41 41
See notes on page D-10
D-11
 LINEAR BAR GRILLE

DOUBLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: DDLBG & DDLBR - 15° DEFLECTION BLADES (IP UNITS)

Neck Face Pt
Width Air Flow (CFM / LFT) Throw @ (50/100/150) FPM NC
Velocity (FPM) Velocity (FPM) (in-wg)

32 106 171 0.007 8 5 2 <15

65 215 360 0.027 10 6 3 <15
97 337 531 0.060 14 9 6 <15
4 129 443 717 0.106 18 13 9 17
Ak = 0.295 162 550 894 0.166 21 16 11 24
Af = 0.184 194 663 1078 0.237 24 19 12 31
226 782 1255 0.320 27 20 14 36
258 887 1440 0.418 29 22 16 40
323 1106 1801 0.655 32 25 19 45
97 1093 1778 0.696 30 6 5 <15
129 294 528 0.036 14 9 6 <15
162 358 662 0.056 16 13 6 20
6 194 429 803 0.080 19 15 9 26
Ak = 0.459 226 505 930 0.108 22 18 11 32
Af = 0.426 258 573 1061 0.142 24 19 14 35
323 716 1331 0.222 27 21 15 42
388 850 1593 0.320 30 23 17 48
452 998 1860 0.433 33 26 19 54
97 150 317 0.007 12 8 4 <15
129 209 423 0.012 20 13 6 <15
162 258 530 0.019 23 15 7 <15
8 194 314 636 0.027 25 18 10 <15
Ak = 0.623 226 365 742 0.037 28 21 14 21
Ak = 0.308 258 423 847 0.048 29 22 16 27
323 530 1060 0.075 32 25 18 33
388 636 1276 0.108 34 26 20 38
517 848 1715 0.191 37 30 23 43
97 127 234 0.004 11 5 3 <15
129 169 319 0.006 15 8 5 <15
162 212 404 0.010 18 10 6 <15
10 194 254 489 0.014 21 12 9 <15
Ak = 0.800 226 297 565 0.019 23 14 11 <15
Af = 0.407 258 339 637 0.025 25 17 14 <15
323 424 808 0.040 27 19 16 20
388 505 974 0.058 29 21 18 26
517 658 1291 0.101 33 25 21 36
97 107 210 0.002 8 5 2 <15
129 145 274 0.005 12 8 5 <15
162 172 338 0.007 14 10 6 <15
12 194 207 402 0.011 18 12 9 <15
Ak = 0.967 226 237 465 0.014 21 14 10 <15
Af = 0.489 258 276 530 0.018 23 15 12 16
388 422 807 0.040 26 19 15 29
517 553 1082 0.071 30 23 18 38
646 696 1351 0.109 33 26 22 45

See notes on page D-10

D-12
 LINEAR BAR GRILLE

SINGLE DEFLECTION LINEAR BAR GRILLES & REGISTERS: SDLBG & SDLBR (IP UNITS)

Air Flow
Width Pt (in-wg) NC
(CFM / LFT)
65 0.012 16
97 0.025 21
129 0.050 25
4
162 0.080 28
194 0.106 30
226 0.140 32
129 0.013 <15
162 0.024 20
194 0.035 26
6
226 0.051 30
258 0.068 35
291 0.085 39
129 0.012 18
194 0.025 24
258 0.050 28
8
323 0.080 30
388 0.106 33
452 0.139 34
194 0.014 <15
258 0.034 18
323 0.048 23
10
388 0.071 35
452 0.096 37
582 0.155 43
194 0.010 <15
258 0.013 18
323 0.024 23
12
388 0.035 35
452 0.051 37
582 0.088 43

See notes on page D-10

D-13
LINEAR SLOT
E
DIFFUSER
We Care For The Air You Breathe

www.flowtechind.com Part of
 LINEAR SLOT DIFFUSER

Linear Slot Diffuser Index

APPLICATIONS E1
SUPPLY LINEAR SLOT DIFFUSER-20mm FRAME (SLSD-20) & RETURN LINEAR SLOT DIFFUSER-20MM FRAME (RLSD-20) E1
DIMENSIONS (FIXED 45° ENDCAP) - SLSD-20 / RLSD-20 E2
MOUNTING OPTION - SLSD-20 / RLSD-20 E2
FINISH OPTION - SLSD-20 / RLSD-20 E2
ACCESSORIES - SLSD-20 / RLSD-20 E3
SUPPLY LINEAR SLOT DIFFUSER (SLSD) & RETURN LINEAR SLOT DIFFUSER (RLSD) E4
DIMENSIONS (FIXED 45° ENDCAP) - SLSD / RLSD E4
DIMENSIONS (REMOVABLE 90° END CAP MODEL) - SLSD / RLSD E5
SUPPLY LINEAR SLOT DIFFUSER (SLSD-S) & RETURN LINEAR SLOT DIFFUSER (RLSD-S) E5
DIMENSIONS (FIXED 45° ENDCAP) - SLSD-S & RLSD-S E6
DIMENSIONS (REMOVABLE 90° END CAP MODEL) - SLSD-S & RLSD-S E6
MOUNTING / FINISH OPTIONS E7
ACCESSORIES (90° END CAP MODEL) E7
SUPPLY LINEAR SLOT DIFFUSER-HIDDEN FRAME (SLSD-HF) & RETURN LINEAR SLOT DIFFUSER-HIDDEN FRAME (RLSD-HF) E8
DIMENSIONS (FIXED 45° ENDCAP) - SLSD-HF & RLSD-HF E8
ACCESSORIES E9
MOUNTING OPTION E9
FINISH OPTION E9
PLENUM BOXES, FOR 45OEND CAP E10
PLENUM BOXES, FOR 90OEND CAP E11
SUPPLY LINEAR SLOT DIFFUSER-PLASTER TYPE (SLSD-P) & RETURN LINEAR SLOT DIFFUSER-PLASTER (RLSD-P) E12
DIMENSIONS SLSD-P / RLSD-P E12
ORDERING SYSTEM E13
GENERAL NOTES E13
TEST REPORTS E13
PERFORMANCE DATA - SI UNITS - NOTES, SYMBOLS, CONDITIONS E14
PERFORMANCE DATA: SUPPLY AIR SLOT DIFFUSER - SLSD-20, SLSD , SLSD-S, SLSD-HF - HORIZONTAL (SI UNITS) E15
PERFORMANCE DATA: SUPPLY AIR SLOT DIFFUSER - SLSD-20, SLSD , SLSD-S, SLSD-HF - VERTICAL (SI UNITS) E16
PERFORMANCE DATA: PLASTER SUPPLY AIR SLOT DIFFUSER - SLSD-P (SI UNITS) E16
PERFORMANCE DATA - IP UNITS - NOTES, SYMBOLS, CONDITIONS E17
PERFORMANCE DATA: SUPPLY AIR SLOT DIFFUSER - SLSD-20, SLSD , SLSD-S, SLSD-HF - HORIZONTAL (IP UNITS) E18
PERFORMANCE DATA: SUPPLY AIR SLOT DIFFUSER - SLSD , SLSD-S, SLSD-HF - VERTICAL (IP UNITS) E19
PERFORMANCE DATA: RETURN AIR SLOT DIFFUSER - RLSD , RLSD-S, RLSD-HF (IP UNITS) E19
 LINEAR SLOT DIFFUSER

APPLICATIONS
FLOWTECH Linear Slot Diffuser (LSD) is a high capacity slot
diffuser suited to a wide range of applications.
With its pleasant aesthetic appearance it can be used in variety of
prestigious locations such as Lobbies, Dining Hall, Hotels, Palaces
and Building Entrances where aesthetic is architecturally critical.
For this purpose, FLOWTECH LSD can be supplied in a straight or
curved shape with a wide variety of powder coated colors.
Functionally, Linear Slot Diffusers are used in large open areas
where perimeter supply or return is required. FLOWTECH LSD
is provided with unique curved design of air deflecting vanes
which can be adjusted as required to achieve precise control of
air flow direction. Usually directional control is required towards
perimeter heat source or away from adjacent glass areas.
With its steady performance at variable air flow rates, FLOWTECH
LSD can be effectively used as part of VAV systems. It can be
combined with unitary plenum boxes of designer choice.
FLOWTECH LSD can be used as supply air diffuser, return air
diffuser or dummy ceiling diffuser for decorative purposes.

SUPPLY LINEAR SLOT DIFFUSER WITH HIT & MISS DAMPER AND WITH DEFLECTORS - 20mm FRAME (SLSD-20)
& RETURN LINEAR SLOT DIFFUSER WITH HIT DAMPER AND WITHOUT DEFLECTORS - 20MM FRAME (RLSD-20)

180° fully adjustable air flow patterns by means of two air

deflector blades per slot.
Available in Hit and Miss Damper of GI sheet to control air flow
rate without affecting the air flow patterns.
45o Supply Linear Slot Diffusers (SLSD-20) Both Deflector Blades and Hit & Miss Damper are powder
coated with black color.
Frame and curved deflection blades are made of extruded
aluminium alloy 6063 to T6 Heat Treatment.
For maximum rigidity, profiles are fixed at equally spaced
intervals using Screw Rods and Cylindrical shims of 6mm
diameter, made of extruded aluminium.
Curved Segments are available for both sidewall curves (CS) and
ceiling curves (CP), with minimum radius of curvature of 1000mm.

Type SLSD-20 with Deflectors and Hit & Miss Dampers Surface mount design.
Maximum of one piece length is 3000mm. Larger pieces are
Standard slot width is 1/2” (16mm), 3/4” (20mm) and 1” (25mm). jointed using hairline butt joints held by special aligntment
Available in 1 to 8 slots. strips to ensure continuous unbroken runs.

E-1
 LINEAR SLOT DIFFUSER

DIMENSIONS (FIXED 45° ENDCAP) - SLSD-20 / RLSD-20

Type SLSD-20 with Deflectors and Hit & Miss Dampers

Standard Slot Size 25 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 40 79 117 157 196 235 273 312
Neck Size B (mm) 65 103 143 182 222 260 292 337

Standard Slot Size 20 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 36 70 104 138 172 206 241 274
Neck Size B (mm) 60 94 128 164 198 232 265 299

Standard Slot Size 16 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 32 62 92 122 152 183 213 242
Neck Size B (mm) 56 86 113 146 177 203 238 267

MOUNTING OPTION
Recommended Mounting of Linear Slot Diffuser with a Mounting of Linear Slot Diffuser with a Plenum Box
Plenum Box

FINISH OPTION
Available in powder coated RAL 9010 or 9016 as standard color.
Deflectors and Hit & Miss Damper are powder coated in black color as standard.
Other powder coated finishes are available on request.

E-2
 LINEAR SLOT DIFFUSER

ACCESSORIES
Plenum Boxes:
Suitable for supply and exhaust linear slot diffuser. (SLSD-20 / RLSD-20)
Galvanized steel construction.
Supply as standard with one side inlet per metre length.

Options:
Manual quadrant damper, code RVCD.

Sizes:
Maximum length available 24000mm.
Other Ø D available on request. Plenum Boxes, for 45oend cap

Standard Slot Size 25 mm - 45O END CAP

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
H­­1 225 225 275 275 325 325 375 375
H­­2 75 75 75 75 75 75 75 75
N 48 87 125 165 204 243 281 320
ØD 150 150 200 200 250 250 300 300
W 153 197 243 285 330 373 417 461

Standard Slot Size 20 mm - 45O END CAP

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
H­­1 225 225 275 275 325 325 375 375
H­­2 75 75 75 75 75 75 75 75
N 44 78 112 146 180 214 249 282
ØD 150 150 200 200 250 250 300 300
W 148 187 226 265 304 343 382 421

Standard Slot Size 16 mm - 45O END CAP

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
H­­1 175 225 225 275 275 325 325 375
H­­2 75 75 75 75 75 75 75 75
N 40 70 100 130 160 191 221 250
ØD 100 150 150 200 200 250 250 300
W 143 177 211 245 279 313 347 383

Notes:
The above parameters for 1m length.
Maximum length as a single piece is 2.4m.

E-3
 LINEAR SLOT DIFFUSER

SUPPLY LINEAR SLOT DIFFUSER WITH HIT & MISS DAMPER AND WITH DEFLECTORS (SLSD)
& RETURN LINEAR SLOT DIFFUSER WITH HIT DAMPER AND WITHOUT DEFLECTORS (RLSD)
180° fully adjustable air flow patterns by means of two air
deflector blades per slot.

Available in Hit and Miss Damper of GI sheet to control air flow

rate without affecting the air flow patterns.
45o Supply Linear Slot Diffusers (SLSD)
Both Deflector Blades and Hit & Miss Damper are powder coated
with black color.
Frame and curved deflection blades are made of extruded
aluminium alloy 6063 to T6 Heat Treatment.

90o Supply Linear Slot Diffusers (SLSD) For maximum rigidity, profiles are fixed at equally spaced
intervals using Screw Rods and Cylindrical shims of 6mm
Maximum of one piece length is 3000mm. Larger pieces are diameter, made of extruded aluminium.
jointed using hairline butt joints held by special aligntment Curved Segments are available for both sidewall curves (CS) and
strips to ensure continuous unbroken runs. ceiling curves (CP), with minimum radius of curvature of 1000mm.
Available in 1 to 8 slots. Surface mount design.
Standard slot width is 1/2” (16mm), 3/4” (20mm) and 1” (25mm). Also available with a 90° end cap

DIMENSIONS (FIXED 45° ENDCAP) - SLSD / RLSD

Type SLSD with Deflectors and Hit & Miss Dampers

Standard Slot Size 25 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 45 89 134 177 222 265 309 353
Neck Size B (mm) 91 137 179 223 269 314 355 399

Standard Slot Size 20 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 40 79 118 157 196 235 274 313
Neck Size B (mm) 87 125 164 200 242 281 320 359

Standard Slot Size 16 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 35 69 103 137 171 205 239 275
Neck Size B (mm) 82 116 150 184 218 252 286 320

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 LINEAR SLOT DIFFUSER

DIMENSIONS (REMOVABLE 90° END CAP MODEL) - SLSD / RLSD

Type SLSD with Deflectors and Hit & Miss Dampers (90° End Cap Model)
Standard Slot Size 25 mm
No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 45 89 133 177 221 265 309 355
Neck Size B (mm) 81 125 170 215 260 304 347 393

Standard Slot Size 20 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 40 79 118 157 198 235 274 315
Neck Size B (mm) 76 115 154 193 235 272 312 354

Standard Slot Size 16 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 36 70 104 138 172 206 240 274
Neck Size B (mm) 72 106 140 174 208 244 276 313

SUPPLY LINEAR SLOT DIFFUSER WITH HIT & MISS DAMPER AND WITHOUT DEFLECTORS (SLSD-S)
& RETURN LINEAR SLOT DIFFUSER WITH HIT DAMPER AND WITHOUT DEFLECTORS (RLSD-S)
Available in Hit and Miss Damper of GI sheet to control air flow
rate without affecting the air flow patterns.
Hit & Miss Damper are powder coated with black color.

45o Supply Linear Slot Diffusers (SLSD-S) Frame and curved deflection blades are made of extruded
aluminium alloy 6063 to T6 Heat Treatment.
For maximum rigidity, profiles are fixed at equally spaced
intervals using Screw Rods and Cylindrical shims of 6mm
diameter, made of extruded aluminium.
Curved Segments are available for both sidewall curves (CS) and
90o Linear Slot Diffusers (SLSD-S) ceiling curves (CP), with minimum radius of curvature of 1000mm.
Maximum of one piece length is 3000mm. Larger pieces are
jointed using hairline butt joints held by special aligntment strips
to ensure continuous unbroken runs.
Available in 1 to 8 slots. Also available with a 90° end cap
Standard slot width is 1/2” (16mm), 3/4” (20mm) and 1” (25mm).
SLSD-S with Hit & Miss Dampers
E-5
 LINEAR SLOT DIFFUSER

DIMENSIONS (FIXED 45° ENDCAP) - SLSD-S & RLSD-S

SLSD-S with Hit & Miss Dampers

Standard Slot Size 25 mm
No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 45 89 134 177 222 265 309 353
Neck Size B (mm) 91 137 179 223 269 314 355 399

Standard Slot Size 20 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 40 79 118 157 196 235 274 313
Neck Size B (mm) 87 125 164 200 242 281 320 359

Standard Slot Size 16 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 35 69 103 137 171 205 239 275
Neck Size B (mm) 82 116 150 184 218 252 286 320

DIMENSIONS (REMOVABLE 90° END CAP MODEL) - SLSD-S & RLSD-S

SLSD-S with Hit & Miss Dampers (90O End Cap Model)
Standard Slot Size 25 mm
No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 45 89 133 177 221 265 309 355
Neck Size B (mm) 81 125 170 215 260 304 347 393

Standard Slot Size 20 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 40 79 118 157 198 235 274 315
Neck Size B (mm) 76 115 154 193 235 272 312 354

Standard Slot Size 16 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 36 70 104 138 172 206 240 274
Neck Size B (mm) 72 106 140 174 208 244 276 313

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 LINEAR SLOT DIFFUSER

MOUNTING / FINISH OPTIONS ACCESSORIES (90° END CAP MODEL)

Available in powder coated RAL 9010 or 9016 as standard color. END CAP (EC)
Other powder coated finishes are available on request. 30mm x 60mm “L” shaped removable End Caps are supplied free
Deflectors and Hit & Miss Damper are powder coated in black with each full length to suit any LSD size. The end cap allows the
color as standard. extending or the shortening of slot diffusers lines without replacing
existing pieces. A mitred end cap is available upon request.
Recommended Mounting of Linear Slot Diffuser with a
Plenum Box

Corner Piece - Wall (CPW) / Ceiling (CPC)

300mm x 300mm up to 1200mm x 1200mm Corner Pieces
are available at 45° to 135° angles for all standard slot sizes.
• Ceiling Type Corner > 90O (CPC)

Mounting of Linear Slot Diffuser with a Plenum Box

• Ceiling Type Corner < 90O (CPC)

Curved Slot Diffusers (CSD)

Slot diffusers can be supplied as a ceiling type curve with • Ceiling Type Corner 90O (CPC)
a minimum radius of 1meter. Our technician will assist in
taking site measurements for special curvatures.

• Wall Type Corner 90O (WC)

E-7
 LINEAR SLOT DIFFUSER

SUPPLY LINEAR SLOT DIFFUSER WITH HIT & MISS DAMPER AND WITH DEFLECTORS - HIDDEN FRAME TYPE (SLSD-HF)
& RETURN LINEAR SLOT DIFFUSER WITH HIT DAMPER AND WITHOUT DEFLECTORS - HIDDEN FRAME TYPE (RLSD-HF)
180° fully adjustable air flow patterns by means of two air
deflector blades per slot.
Available in Hit and Miss Damper of GI sheet to control air flow
rate without affecting the air flow patterns.
45o Hidden Frame Supply Linear Slot Diffusers (SLSD-HF) Both Deflector Blades and Hit & Miss Damper are powder
coated with black color.
Hidden Frame Design
For maximum rigidity, profiles are fixed at equally spaced
Available in 1 to 8 slots. intervals using Screw Rods and Cylindrical shims of 6mm
Available only with 45o End Cap diameter, made of extruded aluminium.
Standard slot width is 1/2” (16mm), 3/4” (20mm) and 1” (25mm). Maximum of one piece length is 3000mm. Larger pieces are
Frame and curved deflection blades are made of extruded jointed using hairline butt joints held by special aligntment
aluminium alloy 6063 to T6 Heat Treatment. strips to ensure continuous unbroken runs.

DIMENSIONS (FIXED 45° ENDCAP) - SLSD-HF & RLSD-HF

SLSD-HF with Deflector and Hit & Miss Dampers

Standard Slot Size 25 mm
No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 45 89 134 177 222 265 309 353
Neck Size B (mm) 91 137 179 223 269 314 355 399

Standard Slot Size 20 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 40 79 118 157 196 235 274 313
Neck Size B (mm) 87 125 164 200 242 281 320 359

Standard Slot Size 16 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 35 69 103 137 171 205 239 275
Neck Size B (mm) 82 116 150 184 218 252 286 320

E-8
 LINEAR SLOT DIFFUSER

ACCESSORIES
Plenum Boxes: Options:
Suitable for supply and exhaust linear slot diffuser. (SLSD / Manual quadrant damper, code RVCD.
RLSD, SLSD-S / RLSD-S, SLSD-HF / RLSD-HF)
Sizes:
Galvanized steel construction.
Maximum length available 24000mm.
Supply as standard with one side inlet per metre length.
Other Ø D available on request.
Special constructions available on request.

Plenum Boxes, for 45oend cap Plenum Boxes for 90o end cap

MOUNTING OPTION

Recommended Mounting of Linear Slot Diffuser HF with a Mounting of Linear Slot Diffuser HF with a Plenum Box
Plenum Box

FINISH OPTION
Available in powder coated RAL 9010 or 9016 as standard color.
Other powder coated finishes are available on request.
Hit & Miss Damper are powder coated in black color as
standard for Light Weight Type

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 LINEAR SLOT DIFFUSER

PLENUM BOXES, FOR 45OEND CAP

Standard Slot Size 25 mm - 45O END CAP

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
H­­1 225 225 275 275 325 325 375 375
H­­2 75 75 75 75 75 75 75 75
N 53 97 142 185 230 273 317 361
ØD 150 150 200 200 250 250 300 300
W 153 197 243 285 330 373 417 461

Standard Slot Size 20 mm - 45O END CAP

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
H­­1 225 225 275 275 325 325 375 375
H­­2 75 75 75 75 75 75 75 75
N 48 87 126 165 204 243 282 321
ØD 150 150 200 200 250 250 300 300
W 148 187 226 265 304 343 382 421

Standard Slot Size 16 mm - 45O END CAP

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
H­­1 175 225 225 275 275 325 325 375
H­­2 75 75 75 75 75 75 75 75
N 43 77 111 145 179 213 247 283
ØD 100 150 150 200 200 250 250 300
W 143 177 211 245 279 313 347 383

Notes:
The above parameters for 1m length.
Maximum length as a single piece is 2.4m.

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 LINEAR SLOT DIFFUSER

PLENUM BOXES, FOR 90OEND CAP

Standard Slot Size 25 mm - 90O END CAP

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
H­­1 225 225 275 275 325 325 375 375
H­­2 75 75 75 75 75 75 75 75
N 53 97 141 185 229 273 317 363
ØD 150 150 200 200 250 250 300 300
W 153 197 241 285 329 373 417 463

Standard Slot Size 20 mm - 90O END CAP

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
H­­1 225 225 275 275 325 325 375 375
H­­2 75 75 75 75 75 75 75 75
N 48 87 126 165 206 243 282 323
ØD 150 150 200 200 250 250 300 300
W 148 187 226 265 306 343 382 423

Standard Slot Size 16 mm - 90O END CAP

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
H­­1 175 225 225 275 275 325 325 375
H­­2 75 75 75 75 75 75 75 75
N 44 78 112 146 180 214 248 282
ØD 100 150 150 200 200 250 250 300
W 144 178 212 246 280 314 348 382

Notes:
The above parameters for 1m length.
Maximum length as a single piece is 2.4m.

E-11
 LINEAR SLOT DIFFUSER

SUPPLY PLASTER LINEAR SLOT DIFFUSER WITH HIT & MISS DAMPER AND WITH DEFLECTORS - PLASTER TYPE (SLSD-P)
& RETURN PLASTER LINEAR SLOT DIFFUSER WITH HIT DAMPER AND WITHOUT DEFLECTORS - PLASTER TYPE (RLSD-P)
Suitable for installation within ceilings. Can directly install
it in a cut out in the plaster board ceiling where the outer
boarder sets in suitable for a plaster skim.
Frame and curved deflection blades are made of extruded
aluminium alloy 6063 to T6 Heat Treatment.

Available in Hit and Miss Damper of GI sheet to control air flow

rate without affecting the air flow patterns.
180° fully adjustable air flow patterns by means of two air
deflector blades per slot.
Maximum of one piece length is 3000mm. Larger pieces are
Plaster Supply Linear Slot Diffuser (SLSD - P) jointed using hairline butt joints held by special alignment
strips to ensure continuous unbroken runs.
Plaster-in design. Available in 1 to 8 slots.
Both Deflector Blades and Hit & Miss Damper are powder
Standard slot width is 1/2”(16mm), 3/4”(20mm) and 1” (25mm). coated with black color.

DIMENSIONS SLSD-P / RLSD-P

Type SLSD-P with Deflectors and Hit & Miss Dampers

Standard Slot Size 25 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 45 90 134 179 223 268 311 355
Neck Size B (mm) 95 138 183 229 273 318 362 405

Standard Slot Size 20 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 40 80 119 158 197 236 275 310
Neck Size B (mm) 90 130 170 206 245 287 325 362

Standard Slot Size 16 mm

No. of Slots 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Slot
Neck Size A (mm) 35 70 105 140 175 207 242 275
Neck Size B (mm) 85 120 157 187 225 257 294 327

E-12
 LINEAR SLOT DIFFUSER

ORDERING SYSTEM
Ordering Example
SLSD-3-1200-9016
RAL Code Color Stands for SLSD model, 3-Slots, 1200mm
length and powder coated to RAL-9016
Length in mm or inch color code.
No. of Slots
Notes:
SLSD-20 : Supply Linear Slot Diffuser - 20mm Frame
RLSD-20 : Return Linear Slot Diffuser - 20mm Frame For Curved Segments, remark of curvature
SLSD : Supply Linear Slot Diffuser and plan of curvature shall be included in
RLSD : Return Linear Slot Diffuser
the order. Our technicians are available, at
SLSD - S : Supply Linear Slot Diffuser - Type S
RLSD - S : Return Linear Slot Diffuser - Type S your request, to take actual measurements
SLSD - HF : Supply Linear Slot Diffuser - Hidden Frame on site without any extra charges.
RLSD - HF : Return Linear Slot Diffuser - Hidden Frame
SLSD-P : Plaster Supply Linear Slot Diffuser Aligning strips are provided with each
RLSD-P : Plaster Return Linear Slot Diffuser
length of 3m.

GENERAL NOTES
Pages onwards give performance data for all models and variants, 6. Models with reduced necks. There is a ‘dilution effect’ on
and unless otherwise stated the following general notes apply: performance for these models, as the air tends to spread behind
the core, reducing throws by up to 20%, depending on the
1. Throws shown are to three terminal velocity of 0.25m/s, relationship between the neck size and the base diffuser
0.50m/s, 0.75m/s, (50fpm, 100fpm, 150fpm) with supply air at size. For more information, please check with the factory.
conditions with max ∆T = 10k cooling.
7. The following tables include the results of test conducted on
2. For standard room height of 2.75 metres, throws should be taken samples of air terminals. The test results include Noise Criteria
as the distance to the nearest wall (minimum plan dimension, MPD). (NC), static pressure versus air flow, throw and effective area.
3. To avoid air flow ‘dumping’ on cooling cycles at the grille core, it Extrapolation was used to obtain the performance for other
is advisable to ensure that the neck velocities do not drop below sizes and other parameters within the range of products
0.75m/s (150fpm). mentioned above.

4. The acoustic data were tested in accordance to ASHRAE Test method included in Report.
70-1991 standard. The octave band sound power levels ob-
tained were plotted to determine the point of tangency with TEST REPORTS
the highest rank Noise Criteria curve (NC) to establish the NC.
Performance Test Certificate Performance Test Certificate

Noise Criteria ratings were determined by subtracting room Issued To

FLOWTECH
PO BOX 1871
Issued To

FAISAL JASSIM TRADING CO LLC

PO BOX 1871, ABU HAIL

absorption of 10dB from the sound power level data.

DUBAI, U.A.E. DUBAI, UNITED ARAB EMIRATES

Intertek has tested representative samples of Intertek has tested a representative sample of
Flowtech Linear Slot Diffusers Faisal Jassim Plaster Type Slot Diffuser.

Linear Slot Diffusers (two slot and three slot) A Plaster Type Slot Diffuser (3 Slot)
were tested in accordance with the standards listed below and were found was tested in accordance with the standards listed below and was found
to perform in a manner appropriate to the dictates of the standards. to perform in a manner appropriate to the dictates of the standards.

STANDARDS STANDARDS

5. NC and Pressure values shown, are based on a complete

ASHRAE 70-1991 Standard “Method of Testing for Rating the Performance of Air Outlets and Inlets” ASHRAE 70-2006 Standard “Method of Testing for Rating the Performance of Air Outlets and Inlets”

ADC1062: GRD-84 “Test Code for Grilles, Registers and Diffusers” ADC1062: GRD-84 “Test Code for Grilles, Registers and Diffusers”

ISO 5219:1984 “Air distribution and air diffusion – ISO 5219:1984 “Air distribution and air diffusion –

unit with an opposed blade in the fully open position for the
Laboratory aerodynamic testing and rating of air terminal devices” Laboratory aerodynamic testing and rating of air terminal devices”

ISO 3741:1999 “Acoustics — Determination of sound power levels of noise sources ISO 3741:2010 “Acoustics - Determination of Sound Power Levels and Sound Energy Levels of Noise Sources
using sound pressure — Precision methods for reverberation rooms” Using Sound Pressure - Precision Methods for Reverberation Test Rooms”

SCOPE OF TESTING SCOPE OF TESTING

supply register and without damper for the return grille. The
The linear slot diffusers were tested for the following performance characteristics: The Plaster Type Slot Diffuser (3 Slot) was tested for the following performance characteristics:
"Reference Intertek Report Numbers 3063712-006 and 3063712-007 dated September 16 and 21, 2004” "Reference Intertek Report Number 104216186CRT-001 dated February 24, 2020”

A) Sound Power Level ((NC) A) Sound Power Level ((NC)

B) Air Volume versus Static Pressure B) Air Volume versus Static Pressure
C) Area Factor C) Area Factor

damper should only be used for fine balancing, as for every

D) Throw Pattern D) Throw Pattern

Date: September 24, 2020 Date: October 2, 2020

doubling of pressure there is a resulting increase in the noise

James R. Kline James R. Kline
Intertek Intertek
Engineer / Quality Supervisor Engineer / Quality Supervisor

level of +9dB for supply, or +5dB for exhaust.

This Verification is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's This Verification is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's
responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in
accordance with the agreement, for any loss, expense or damage occasioned by the use of this Verification. Only the Client is authorized to copy or accordance with the agreement, for any loss, expense or damage occasioned by the use of this Verification. Only the Client is authorized to copy or
distribute this Verification. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service distribute this Verification. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service
must first be approved in writing by Intertek. The observations and test results referenced from this Verification are relevant only to the sample tested. must first be approved in writing by Intertek. The observations and test results referenced from this Verification are relevant only to the sample tested.
This Verification by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. This Verification by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program.

E-13
 LINEAR SLOT DIFFUSER

PERFORMANCE DATA - SI UNITS

Symbols: Notes:
L/sec : Air Volume in Litres per second. The large throw values are based on the minimum terminal
velocity of 0.25 m/sec.
Af : Effective free area in square meters.
The middle throw values are based on the medium terminal
Vf : Face Velocity in meters per second. velocity of 0.50 m/sec.
Ak : Neck Area in square meters. The small throw values are based on the maximum terminal
Vk : Neck Velocity in meters per second. velocity of 0.75 m/sec.
Ps : Static pressure in Pascal. Conditions:
Pv : Velocity pressure in Pascal. Supply or Return as indicated.
Pt : Total pressure in Pascal. Noise Criteria values are based on (10dB) room attenuation.
Th : Throw in meters. Damper is fully open.
NC : Noise Criteria. Maximum room height = 4.0m
Maximum Cooling @ ∆T = 10K

NOTES

E-14
 LINEAR SLOT DIFFUSER

SUPPLY AIR SLOT DIFFUSER - SLSD-20, SLSD , SLSD-S, SLSD-HF - HORIZONTAL (SI UNITS)
No. Air Flow 16 mm SLOT WIDTH 20 mm SLOT WIDTH
of (L/s) / Effective Throw @ Effective Throw @
Pt (Pa) NC Pt (Pa) NC
Slots LM Area (m2/LM) (0.25/0.50/0.75) m/s Area (m2/LM) (0.25/0.50/0.75) m/s
25 14 2.8 1.6 0.7 24 9 2.5 1.3 0.4 19
40 38 3.8 2.5 1.5 35 24 3.5 2.2 1.2 28
1 0.004 0.005
55 70 6.2 3.9 2.4 46 45 5.7 3.6 2.1 36
70 112 8.4 5.7 3.9 54 72 7.8 5.1 3.6 43
25 5 2.8 1.9 1.2 16 3 2.5 1.6 0.9 <15
50 19 5.7 3.4 1.5 27 12 5.4 3.1 1.2 22
2 0.011 0.013
75 42 7.7 4.4 2.0 41 27 7.0 4.0 1.7 33
100 74 9.8 6.5 3.0 52 47 8.9 5.9 2.7 42
50 9 4.0 2.0 1.3 22 6 3.7 1.7 1.0 18
75 20 6.4 3.2 1.9 31 10 4.2 1.9 1.6 24
3 0.018 0.025
100 36 8.1 4.8 2.3 41 18 7.5 4.4 2.0 33
125 58 10.2 6.5 3.4 49 27 8.6 5.9 3.1 39
75 12 5.1 2.3 1.6 25 7 4.8 1.8 1.3 20
100 21 6.4 3.6 1.9 33 13 5.8 3.3 1.6 26
4 0.024 0.03
125 32 7.9 4.8 2.4 40 20 6.4 4.4 2.1 31
150 46 9.8 6.6 3.3 46 29 7.4 6.0 3.0 37
100 16 5.8 2.7 2.0 28 10 5.2 2.4 1.7 22
125 24 7.0 4.0 2.6 34 15 6.9 4.1 2.5 27
5 0.03 0.038
150 35 8.3 5.2 3.2 40 22 9.3 6.2 3.6 31
175 47 10.2 6.9 4.0 46 30 7.9 5.1 3.0 36
125 18 5.9 3.0 2.0 30 12 6.1 3.4 2.1 24
150 26 7.1 4.1 2.6 36 17 6.5 3.8 2.3 29
6 0.037 0.046
175 36 8.8 5.5 3.1 41 23 8.7 5.1 2.8 33
200 47 10.6 7.0 3.6 46 30 9.7 6.4 3.3 36

25 mm SLOT WIDTH
No. of Slots Air Flow (L/s) / LM
Effective Area (m /LM) Pt (Pa) Throw @ (0.25/0.50/0.75) m/s
2
NC
25 6 2.2 2.0 1.2 <15
40 16 3.2 1.9 1.0 23
1 0.006
55 29 5.2 3.3 1.8 29
70 46 7.2 4.5 3.3 34
25 2 2.2 1.3 0.9 <15
50 8 4.8 2.8 0.9 17
2 0.018
75 17 6.4 3.7 1.4 26
100 30 8.2 5.3 2.4 33
50 4 3.4 1.4 0.9 <15
75 8 5.4 2.6 1.3 19
3 0.028
100 15 6.9 4.0 1.7 26
125 24 8.6 5.3 2.8 31
75 5 4.5 1.7 1.0 16
100 8 5.4 3.0 1.3 21
4 0.038
125 13 6.6 4.1 1.8 25
150 19 8.5 5.4 2.7 29
100 6 4.8 2.1 1.4 18
125 10 5.8 3.4 2.0 22
5 0.048
150 14 6.9 4.4 2.5 25
175 19 8.4 5.7 3.2 29
125 8 4.7 2.2 1.4 19
150 11 5.9 3.4 2.0 23
6 0.058
175 15 7.3 4.5 2.5 26
200 19 8.8 5.8 3.0 29

See notes on page E-14

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 LINEAR SLOT DIFFUSER

SUPPLY AIR SLOT DIFFUSER - SLSD-20, SLSD , SLSD-S, SLSD-HF - VERTICAL &
PLASTER SUPPLY AIR SLOT DIFFUSER - SLSD-P (SI UNITS)
16 mm SLOT WIDTH 20 mm SLOT WIDTH 25 mm SLOT WIDTH
No. of Slots Air Flow (L/s)/LM
Effective Area (m2/LM) Pt (Pa) Throw (m) NC Effective Area (m2/LM) Pt (Pa) Throw (m) NC Effective Area (m2/LM) Pt (Pa) Throw (m) NC
25 10 2.5 15 7 2.2 <15 4 1.9 <15
40 28 3.5 23 18 3.1 18 12 2.7 <15
1 55 0.006 38 5.5 32 0.008 33 4.9 25 0.010 21 4.3 21
60 42 6.2 35 39 5.6 28 25 5.0 22
75 96 - 42 62 - 34 39 - 26
90 141 - 49 90 - 39 58 - 30
25 4 2.5 16 2 2.2 <15 2 1.9 <15
50 14 5.4 21 9 4.8 17 6 4.2 <15
75 31 6.7 30 20 6.1 24 13 5.5 19
2 0.017 0.019 0.026
100 56 8.7 42 36 8.0 32 23 7.3 27
125 87 - 48 55 - 36 35 - 31
150 125 - 56 80 - 41 51 - 35
50 7 3.3 17 4 2.9 <15 3 2.6 <15
75 14 5.5 21 9 4.9 17 6 4.3 <15
100 26 7.2 30 11 6.6 24 11 6.0 19
3 0.024 0.029 0.038
125 40 9.0 38 16 8.3 30 16 7.7 24
150 57 - 45 29 - 35 23 - 28
175 78 - 50 37 - 40 32 - 32
75 9 4.5 17 6 4.2 <15 4 3.9 <15
100 15 5.5 22 10 5.1 18 6 4.8 <15
125 24 6.9 29 15 6.3 23 10 5.7 19
4 0.030 0.037 0.046
150 35 8.9 35 22 8.2 28 14 7.5 22
175 47 - 40 30 - 32 19 - 25
200 62 - 43 40 - 35 25 - 28
100 10 4.8 16 7 4.5 <15 4 4.2 <15
125 16 5.9 21 10 5.6 16 6 5.2 <15
150 23 7.5 27 14 6.9 22 9 6.3 17
5 0.037 0.046 0.058
175 31 9.1 33 20 8.4 26 13 7.7 21
200 40 - 37 26 - 29 16 - 23
225 51 - 42 33 - 33 21 - 27
125 11 5.0 16 7 4.6 <15 5 4.2 <15
150 16 6.2 20 10 5.6 16 7 5.0 <15
175 22 7.8 25 14 7.2 20 9 6.6 <15
6 0.043 0.056 0.068
200 29 9.7 29 18 9.0 23 12 8.2 19
225 37 - 33 23 - 26 15 - 21
250 45 - 37 29 - 29 19 - 24

RETURN AIR SLOT DIFFUSER - RLSD-20, RLSD , RLSD-S, RLSD-HF & PLASTER RETURN AIR SLOT
DIFFUSER - RLSD-P (SI UNITS)
16 mm Slot Width 20 mm Slot Width 25 mm Slot Width
No. of Slots Air Flow (L/s) / LM
Pt (Pa) NC Pt (Pa) NC Pt (Pa) NC
40 46 27 29 22 19 17
50 70 33 45 27 29 22
1
65 118 45 76 36 49 29
80 180 54 115 43 74 34
75 47 26 30 21 19 17
90 69 34 44 28 28 22
2
100 84 38 54 31 35 25
125 129 47 83 38 53 30
100 47 27 30 22 19 17
125 72 35 46 27 30 22
3
150 104 41 66 33 43 27
200 187 52 120 41 77 33
150 74 30 47 24 30 19
175 100 37 64 30 41 24
4
200 128 42 82 33 53 27
250 198 50 127 40 81 31
150 52 28 33 22 21 18
200 92 37 59 29 38 23
5
250 144 44 92 35 59 28
300 206 51 132 40 84 32
200 72 31 46 24 30 19
250 113 38 72 31 46 24
6
300 162 46 104 36 66 29
350 220 52 141 41 90 33
See notes on page E-14
E-16
 LINEAR SLOT DIFFUSER

PERFORMANCE DATA - IP UNITS

Symbols Conditions
CFM : Air Volume in cubic feet per minute Supply or Return as indicated.
Af : Effective free area in square feet / per L. Ft. Noise Criteria values are based on (10dB) room attenuation.
Vf : Face Velocity in feet per minute Damper is fully open.
Ak : Neck Area in square feet / per L. Ft Maximum room height = 4.0m
Vk : Neck Velocity in feet per minute Maximum Cooling @ ∆T = 10K
Pt : Total Pressure in inches water gauge Correction on noise criteria NC
Th : Throw in feet L = 3 feet correction + 4db
NC : Noise Criteria. L = 6 feet correction + 6db
Notes L = 10 feet correction + 9db
The large throw values are based on the minimum terminal
velocity of 50 fpm
The middle throw values are based on the medium terminal
velocity of 100 fpm
The small throw values are based on the maximum terminal
velocity of 150 fpm

NOTES

E-17
 LINEAR SLOT DIFFUSER

SUPPLY AIR SLOT DIFFUSER - SLSD-20, SLSD , SLSD-S, SLSD-HF - HORIZONTAL (IP UNITS)
1/2” SLOT WIDTH 3/4” SLOT WIDTH
Air Flow
Effective Effective
No. of Slots (CFM) / Pt Throw @ (50/100/150) Pt Throw @ (50/100/150) fpm
Area (sq. ft/ NC Area (sq. ft/ NC
LFT (In-Wg) fpm Terminal Velocity (In-Wg) Terminal Velocity
LFT) LFT)
16 0.057 9 5 2 24 0.037 8 4 1 19
26 0.153 13 8 5 35 0.098 12 7 4 28
1 0.013 0.016
36 0.283 20 13 8 46 0.181 19 12 7 36
45 0.449 27 19 13 54 0.287 26 17 12 43
16 0.018 9 6 4 16 0.012 8 5 3 <15
32 0.076 19 11 5 27 0.049 18 10 4 22
2 0.036 0.043
48 0.168 25 14 6 41 0.107 23 13 5 33
65 0.298 32 21 10 52 0.191 29 19 9 42
32 0.038 13 6 4 22 0.024 12 5 3 18
48 0.082 21 11 6 31 0.040 19 10 5 24
3 0.059 0.082
65 0.146 27 16 8 41 0.072 24 14 7 33
81 0.232 33 21 11 49 0.108 32 19 10 39
48 0.047 17 8 5 25 0.030 16 6 4 20
65 0.083 21 12 6 33 0.053 19 11 5 26
4 0.079 0.098
81 0.128 26 16 8 40 0.082 21 15 7 31
97 0.185 32 22 11 46 0.118 24 20 10 37
65 0.063 19 9 6 28 0.040 17 8 5 22
81 0.097 23 13 8 34 0.062 23 13 8 27
5 0.098 0.125
97 0.139 27 17 11 40 0.089 30 20 12 31
113 0.190 34 23 13 46 0.121 26 17 10 36
81 0.074 19 10 6 30 0.048 20 11 7 24
97 0.106 23 14 9 36 0.068 21 13 8 29
6 0.121 0.151
113 0.145 29 18 10 41 0.093 26 17 9 33
129 0.190 35 23 12 46 0.122 32 21 11 36

Air Flow 1” SLOT WIDTH

No. of
(CFM) / Effective Area Pt Throw @ (50/100/150)
Slots NC
LFT (sq. ft/LFT) (In-Wg) fpm Terminal Velocity
16 0.024 7 7 4 <15
26 0.063 11 6 3 23
1 0.020
36 0.116 17 11 6 29
45 0.184 24 15 11 34
16 0.008 7 4 3 <15
32 0.031 16 9 3 17
2 0.059
48 0.069 21 12 4 26
65 0.122 27 17 8 33
32 0.016 11 4 3 <15
48 0.034 18 9 4 19
3 0.092
65 0.060 22 13 6 26
81 0.095 28 17 9 31
48 0.019 15 6 3 16
65 0.034 18 10 4 21
4 0.125
81 0.053 22 13 6 25
97 0.076 28 18 9 29
65 0.026 16 7 4 18
81 0.039 19 11 6 22
5 0.157
97 0.057 23 14 8 25
113 0.078 28 19 10 29
81 0.030 15 7 5 19
97 0.043 19 11 7 23
6 0.190
113 0.059 24 15 8 26
129 0.078 29 19 10 29

See notes on page E-17

E-18
 LINEAR SLOT DIFFUSER

SUPPLY AIR SLOT DIFFUSER - SLSD , SLSD-S, SLSD-HF - VERTICAL (IP UNITS)
No. of Air Flow 1/2” SLOT WIDTH 3/4” SLOT WIDTH 1” SLOT WIDTH
Slots (CFM/LFT) Effective Area (ft2/LFT) Pt (In-wg) Throw (ft) NC Effective Area (ft2/LFT) Pt (In-wg) Throw (ft) NC Effective Area (ft2/LFT) Pt (In-wg) Throw (ft) NC
16 0.042 8 15 0.027 7 < 15 0.017 6 < 15
26 0.113 12 23 0.072 10 18 0.046 9 < 15
1 36 0.020 0.153 18 32 0.026 0.134 16 25 0.033 0.085 14 21
39 0.170 20 35 0.158 18 28 0.101 16 22
48 0.387 - 42 0.248 - 34 0.158 - 26
58 0.566 - 49 0.362 - 39 0.232 - 30
16 0.014 8 16 0.009 7 < 15 0.006 6 < 15
32 0.057 18 21 0.036 16 17 0.023 14 < 15
48 0.126 22 30 0.080 20 24 0.051 18 19
2 0.056 0.062 0.085
65 0.225 28 42 0.144 26 32 0.092 24 27
81 0.348 - 48 0.223 - 36 0.142 - 31
97 0.502 - 56 0.321 - 41 0.206 - 35
32 0.027 11 17 0.017 10 < 15 0.011 9 < 15
48 0.058 18 21 0.037 16 17 0.024 14 < 15
65 0.104 23 30 0.044 21 24 0.043 20 19
3 0.079 0.095 0.125
81 0.160 30 38 0.064 27 30 0.066 25 24
97 0.229 - 45 0.116 - 35 0.094 - 28
113 0.312 - 50 0.149 - 40 0.128 - 32
48 0.035 15 17 0.023 14 < 15 0.015 13 < 15
65 0.062 18 22 0.040 17 18 0.026 16 < 15
81 0.097 23 29 0.062 21 23 0.039 19 19
4 0.098 0.121 0.151
97 0.139 29 35 0.089 27 28 0.057 25 22
113 0.189 - 40 0.121 - 32 0.078 - 25
129 0.248 - 43 0.159 - 35 0.102 - 28
65 0.041 16 16 0.026 15 < 15 0.017 14 < 15
81 0.063 19 21 0.040 18 16 0.026 17 < 15
97 0.091 25 27 0.058 23 22 0.037 21 17
5 0.121 0.151 0.190
113 0.124 30 33 0.079 28 26 0.051 25 21
129 0.161 - 37 0.103 - 29 0.066 - 23
145 0.204 - 42 0.131 - 33 0.084 - 27
81 0.045 16 16 0.029 15 < 15 0.018 14 < 15
97 0.065 20 20 0.042 18 16 0.027 16 < 15
113 0.089 25 25 0.057 23 20 0.036 21 < 15
6 0.141 0.184 0.223
129 0.115 32 29 0.074 29 23 0.047 27 19
145 0.147 - 33 0.094 - 26 0.060 - 21
162 0.182 - 37 0.117 - 29 0.074 - 24

RETURN AIR SLOT DIFFUSER - RLSD , RLSD-S, RLSD-HF (IP UNITS)

Air Flow 1/2” Slot Width 3/4” Slot Width 1” Slot Width
No. of Slots
(CFM/LFT) Pt (In-Wg) NC Pt (In-Wg) NC Pt (In-Wg) NC
26 0.185 27 0.118 22 0.076 17
32 0.280 33 0.179 27 0.115 22
1
42 0.476 45 0.305 36 0.195 29
52 0.724 54 0.463 43 0.296 34
48 0.190 26 0.122 21 0.078 17
58 0.277 34 0.177 28 0.113 22
2
65 0.339 38 0.217 31 0.139 25
81 0.518 47 0.332 38 0.212 30
65 0.188 27 0.120 22 0.077 17
81 0.290 35 0.186 27 0.119 22
3
97 0.417 41 0.267 33 0.171 27
129 0.751 52 0.481 41 0.308 33
97 0.296 30 0.189 24 0.121 19
113 0.400 37 0.256 30 0.164 24
4
129 0.516 42 0.330 33 0.211 27
162 0.797 50 0.510 40 0.326 31
97 0.208 28 0.133 22 0.085 18
129 0.369 37 0.236 29 0.151 23
5
162 0.577 44 0.369 35 0.236 28
194 0.828 51 0.530 40 0.339 32
129 0.290 31 0.186 24 0.119 19
162 0.452 38 0.290 31 0.185 24
6
194 0.651 46 0.417 36 0.267 29
226 0.883 52 0.565 41 0.362 33
See notes on page E-17
E-19
 CEILING
DIFFUSER F

We Care For The Air You Breathe

www.flowtechind.com Part of
 CEILING DIFFUSER

Ceiling Diffuser Index

SUPPLY CEILING DIFFUSER (SCD) & RETURN CEILING DIFFUSER (RCD) F1

APPLICATIONS F1

FEATURES F1

OPPOSED BLADE DAMPER F1

STANDARD SIZES F2

DIMENSIONS F2

MULTI PATTERN CEILING DIFFUSERS F2

ACESSORIES F3

FINISH OPTIONS F3

SUPPLY PERFORATED CEILING DIFFUSERS (SPCD) & RETURN PERFORATED CEILING DIFFUSERS (RPCD) F4

SUPPLY DECORATIVE CEILING DIFFUSER (SDCD) & RETURN DECORATIVE CEILING DIFFUSER (RDCD) F4

ORDERING SYSTEM F5

GENERAL NOTES F5

TEST REPORTS F6

PERFORMANCE DATA - SI UNITS - NOTES, SYMBOLS, CONDITIONS F6

PERFORMANCE DATA: SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4S) (SI UNITS) F7

PERFORMANCE DATA: SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4R) (SI UNITS) F8

PERFORMANCE DATA: RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4S) (SI UNITS) F11

PERFORMANCE DATA: RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4R) (SI UNITS) F12

PERFORMANCE DATA - IP UNITS - NOTES, SYMBOLS, CONDITIONS F14

PERFORMANCE DATA: SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4S) (IP UNITS) F15

PERFORMANCE DATA: SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4R) (IP UNITS) F16

PERFORMANCE DATA: RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4S) (IP UNITS) F19

PERFORMANCE DATA: RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4R) (IP UNITS) F20
 CEILING DIFFUSER

SUPPLY CEILING DIFFUSER (SCD) & RETURN CEILING DIFFUSER (RCD)

APPLICATIONS
FLOWTECH provides a wide range of Ceiling Diffusers to suit
the various requirements of ceiling air distribution.
Supply air ceiling diffusers (SCD) and return air ceiling diffusers (RCD)
can be Square or Rectangle in shape with One, Two, Three or Four
Way Patterns. The different diffuser patterns are used to control the
supply air direction. Typical examples of such application are supply
diffusers near glass areas, in corridors and in corners.
FLOWTECH SCD is supplied with Opposed Blades Damper
(OBD) to facilitate the precise air volume control. (Note: OBD is
Supply Air 4 Way Ceiling Diffuser (SCD-4S)
used for fine tuning the air volume flow rate and should not
be used to replace the branch Volume Control Damper). RCD
is supplied without OBD and usually used for return air
applications. In certain applications, SCD must be used as
return air diffuser; that is, where return air volume requires
precise control, such as room pressurization applications.
This is frequently required for Clean Room Engineering
applications such as Hospitals Pharmaceutical Plants,
Biotech Laboratories, Computer Rooms and Silicon Industry.
SCD and RCD are commonly used for Heating, Cooling and
Isothermal Ventilation applications. However, such applications
are limited to 4 meters ceiling height. For Ceiling Heights Supply Air 3 Way Ceiling Diffuser (SCD-3S)
above 4.0 Meters, refer to specially terminal devices such as
Jet Nozzle Diffusers and Drop Ceiling Diffusers.
SCD and RCD are tested by Intertek to ASHRAE 70 - 1991 standard
method of testing for rating performance of air outlets and inlets.
Perforated ceiling diffuser (PCD) is of the same construction
as SCD but with a removable perforated face of GI sheet
powder coated, or aluminium sheet as optional.

FEATURES
Frame and Core are made of extruded aluminium alloy 6063 Return Air Rectangular 4 Way Ceiling Diffuser (RCD-4R)
to T6 Heat Treatment
The Opposed Blades Damper is extruded aluminium alloy 6063/T6
Mitred Corner
Spring loaded core

OPPOSED BLADE DAMPER

FLOWTECH OBD is fixed to the rear frame of SCD model by
means of “S” clamp for ease of removal and rigid construction.
To adjust the OBD opening, remove the core and turn the
adjustment screw available at the front face of the damper
4 Way Supply Ceiling Diffuser with Perforated Face (PCD)
(Clockwise to open / Counter Clockwise to close).
F-1
 CEILING DIFFUSER

STANDARD SIZES DIMENSIONS

Square Ceiling Diffuser
Face Size Neck Size

150 x 150 225 x 225 300 x 300 375 x 375 450 x 450 525 x 525 600 x 600

295 x 295 370 x 370 445 x 445 520 x 520 595 x 595 670 x 670 745 x 745

Rectangular Ceiling Diffuser Multi Pattern Ceiling Diffuser Section Without Damper (RCD)
A & B Size (mm)
225 x 150 370 x 295
300 x 150 445 x 295
375 x 150 520 x 295
450 x 150 595 x 295
525 x 150 670 x 295
300 x 225 445 x 370
375 x 225 520 x 370
450 x 225 595 x 370
525 x 225 670 x 370 Multi Pattern Ceiling Diffuser Section With Damper (SCD)

MULTI PATTERN CEILING DIFFUSERS

4 Way Discharge 3 Way Discharge

Square (SCD-4S) Rectangular (SCD-4R) Square (SCD-3S) Rectangular (SCD-3R)

2 WAY DISCHARGE

Square (SCD-2S) Corner (SCD-2SC) Rectangular Vertical (SCD-2RV) Rectangular Horizontal (SCD-2RH)
1 WAY DISCHARGE

Square (SCD-1S) Rectangular Vertical (SCD-1RV) Rectangular Horizontal (SCD-1RH)

F-2
 CEILING DIFFUSER

ACESSORIES
Opposed blade damper for supply (optional) Equalizing grid (optional)
The specially designed blades have an overlapping lip which Individually adjustable blades, to provide precise directional
assures a tight closure. control of air through the diffuser.
Control is done by adjustment screw through the face of diffuser. Nylon tension bushes.
Material: Extruded aluminium construction. Extruded aluminium construction.

Circular duct connection adaptors (optional) Nominal Size ØD

Type RS Type RT
H1 H2 H3 H4
Suitable for supply and exhaust ceiling diffusers. 150 X 150 100 240 285 150 195
225 X 225 150 290 335 175 220
Round inlet. 300 X 300 200 340 385 200 245
375 X 375 250 390 435 225 270
Galvanized steel construction. 450 X 450
525 X 525
300
350
440
490
485
535
250
275
295
320
Special construction available on request. 600 X 600 400 540 585 300 345

RT - Square to round adaptor. Top inlet RS - Square to round adaptor without perforated plate. Side inlet.

RSP - Square to round adaptor with perforated plate. Side inlet RSI- Insulated square to round adaptor with perforated plate. Side inlet

Fixing FINISH OPTIONS

4 holes 8mm diameter for straps or drop rods. Available in Powder Coated RAL 9010 or 9016 as standard.

Other powder coated color finishes are available on request.

Fixing options are Concealed Screw Fixing.

Standard Fixing (CSF)

F-3
 CEILING DIFFUSER

SUPPLY PERFORATED CEILING DIFFUSERS (SPCD) & RETURN PERFORATED CEILING DIFFUSERS (RPCD)
ACCESSORIES:
Opposed blade damper for supply (optional)
The specially designed blades have an overlapping lip which
assures a tight closure. Control is done by adjustment screw
through the face of diffuser.
Material: Extruded aluminium construction.
This product is designed to provide laminar flow with low
velocities by evenly distributing the downward moving GI Adaptors (optional)
conditioned air. Plenum boxes with ring can be provided to suit the site requirement.
The perforated ceiling diffuser is effective especially in areas
Equalizing grid (optional) - EG
with heavy localized internal loads, as in computer rooms.
Individually adjustable blades, to provide precise directional
The column of air delivered by the perforated ceiling diffuser control of air through the diffuser. Nylon tension bushes.
cools the load source directly without generating high
velocities in the occupied space. Material: Extruded aluminium construction.

SUPPLY DECORATIVE CEILING DIFFUSER (SDCD) & RETURN DECORATIVE CEILING DIFFUSER (RDCD)
With high demand for aesthetics these days, more and more Decorative diffusers can have the core and damper as required.
customers are enquiring about the decorative diffusers.
Available in Powdered Coated RAL 9016 as standard.
Flowtech decorative diffusers comes in a variety of designs
and are commonly used in Majlis, atrium, etc. Other powder coated finishes are available as options.

F-4
 CEILING DIFFUSER

ORDERING SYSTEM

A XB
RAL Code Color

Width in mm or inch

Length in mm or inch

SCD or RCD - 4S : 4 Way Square Diffuser

SCD or RCD - 4R : 4 Way Rectangular Diffuser
SCD or RCD - 3S : 3 Way Square Diffuser
SCD or RCD - 3R : 3 Way Rectangular Diffuser
SCD or RCD - 2S : 2 Way Square Diffuser
SCD or RCD - 2RV : 2 Way Rectangular Vertical
SCD or RCD - 2RH : 2 Way Rectangular Horizontal
SCD or RCD - 1S : 1 Way Square Diffuser
Ordering Example SCD or RCD - 1RV : 1 Way Rectangular Vertical
SCD or RCD - 1RH : 1 Way Rectangular Horizontal
SCD-4S-300mm x 300mm-9010 SPCD or RPCD : Perforated Ceiling Diffuser
Stands for Supply Ceiling Diffuser, 4 Way, 300x300 coating color RAL 9010. SDCD or RDCD : Decorative Ceiling Diffuser

GENERAL NOTES
Pages onwards give performance data for all models and variants, and unless otherwise stated the following general notes apply:

1. Throws shown are to three terminal velocity of 0.25m/s, 0.5m/s, 6. NC and Pressure values shown, are based on a diffuser
0.75m/s, (50fpm, 100fpm, 150fpm) with coanda effect across a flat complete unit with an opposed blade damper in the fully open
ceiling, and with supply air at conditions with max ∆T=10K cooling. position for the supply diffuser and without for the return
diffuser. The damper should only be used for fine balancing,
2. For standard room height of 2.75 metres, throws should be taken as for every doubling of pressure there is a resulting increase
as the distance to the nearest wall (minimum plan dimension, in the noise level of +9dB for supply, or +5dB for exhaust.
MPD), or to half the distance between diffuser centres.
7. Models With Reduced Necks.
3. When mounted without a surrounding closed ceiling, the throw
will be reduced by approx. 40%, ie throw = table throw x 0.6 There is a ‘dilution effect’ on performance for these models, as the air
tends to spread behind the core, reducing throws by up to 20% depending
However, in order to avoid the airflow ‘dumping’ into the on the relationship between the neck size and the base diffuser size. For
space when on cooling mode, giving excessive velocities, more information, please check with the factory.
it may be necessary for coanda plates to be fitted to the
8. For rectangular diffusers, throw values tested are on the longer side of the
diffuser. Please check with factory for details.
diffusers. For the shorter side throws, values are to be multiplied by 0.72.
4. Another fault that can give rise to ‘dumping’ on cooling cycles is low 9. Corrections for 1, 2 and 3 way diffusers
jet velocities at the diffuser core. In order to avoid this, it is advisable to
ensure that neck velocities do not drop below 0.75m/s, (150fpm). 3 way pattern throw: Multiply by 1.15
2 way pattern throw: Multiply by 1.25
5. The acoustic data were tested in accordance to ASHRAE 1 way pattern throw: Multiply by 1.45
70 - 1991 standard. The octave band sound power levels 10. The following tables include the results of tests conducted on
obtained were plotted to determine the point of tangency with samples of air terminals. The test results include Noise Criteria (NC),
the highest rank. Noise Criteria curve (NC) to establish the NC. static pressure verses air flow, throw and effective area. Extrapolation
Noise Criteria ratings were determined by substracting room was used to obtain the performance for other sizes and other
absorption of 10dB from the sound power level data. parameters within the range of products mentioned above.
F-5
 CEILING DIFFUSER

TEST REPORTS

Performance Test Certificate Performance Test Certificate

Issued To Issued To

FLOWTECH FLOWTECH
PO BOX 1871 PO BOX 1871
DUBAI, U.A.E. DUBAI, U.A.E.

Intertek has tested a representative sample of Intertek has tested a representative sample of
Flowtech Return Air Square Four-Way Ceiling Diffuser. Flowtech Square Four-Way Ceiling Diffuser.

A Return Air Square Four-Way Ceiling Diffuser A Square Four-Way Ceiling Diffuser
was tested in accordance with the standards listed below and was found was tested in accordance with the standards listed below and was found
to perform in a manner appropriate to the dictates of the standards. to perform in a manner appropriate to the dictates of the standards.

STANDARDS STANDARDS

ASHRAE 70-1991 Standard “Method of Testing for Rating the Performance of Air Outlets and Inlets” ASHRAE 70-1991 Standard “Method of Testing for Rating the Performance of Air Outlets and Inlets”

ADC1062: GRD-84 “Test Code for Grilles, Registers and Diffusers” ADC1062: GRD-84 “Test Code for Grilles, Registers and Diffusers”

ISO 5219:1984 “Air distribution and air diffusion – ISO 5219:1984 “Air distribution and air diffusion –
Laboratory aerodynamic testing and rating of air terminal devices” Laboratory aerodynamic testing and rating of air terminal devices”

ISO 3741:1999 “Acoustics — Determination of sound power levels of noise sources ISO 3741:1999 “Acoustics — Determination of sound power levels of noise sources
using sound pressure — Precision methods for reverberation rooms” using sound pressure — Precision methods for reverberation rooms”

SCOPE OF TESTING SCOPE OF TESTING

The square four-way ceiling diffuser was tested for the following performance characteristics: The square four-way ceiling diffuser was tested for the following performance characteristics:
"Reference Intertek Report Number 3063712-008 dated September 15, 2004” "Reference Intertek Report Number 3063712-009 dated September 23, 2004”

A) Sound Power Level ((NC) A) Sound Power Level ((NC)

B) Air Volume versus Static Pressure B) Air Volume versus Static Pressure
C) Area Factor
Date: September 24, 2020 D) Throw Pattern

Date: September 24, 2020

James R. Kline
Intertek
Engineer / Quality Supervisor James R. Kline
Intertek
Engineer / Quality Supervisor
This Verification is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's
responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in
accordance with the agreement, for any loss, expense or damage occasioned by the use of this Verification. Only the Client is authorized to copy or
distribute this Verification. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service This Verification is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's
must first be approved in writing by Intertek. The observations and test results referenced from this Verification are relevant only to the sample tested. responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in
This Verification by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program. accordance with the agreement, for any loss, expense or damage occasioned by the use of this Verification. Only the Client is authorized to copy or
distribute this Verification. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service
must first be approved in writing by Intertek. The observations and test results referenced from this Verification are relevant only to the sample tested.
This Verification by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program.

PERFORMANCE DATA - SI UNITS

Symbols Conditions
L/sec : Air Volume in Litres per second. Supply or Return as indicated.
Af : Effective free area in square meters. Noise Criteria values are based on (10dB) room attenuation.
Vf : Face Velocity in meters per second. Damper is fully open.
Ak : Neck Area in square meters. Maximum room height = 4.0m
Vk : Neck Velocity in meters per second. Maximum Cooling @ ∆T = 10K
Pt : Total pressure in Pascal. Correction for 1, 2 and 3 way
Th : Throw in meters. Noise Criteria : No correction required.
NC : Noise Criteria. Pressure : No correction required.
Notes Throw : 3 way - increase for 15%
The large throw values are based on the minimum terminal : 2 way - increase for 25%
velocity of 0.25 m/sec. : 1 way - increase for 45%
The middle throw values are based on the medium terminal Drop : No correction required.
velocity of 0.50 m/sec.
The small throw values are based on the maximum terminal
velocity of 0.75 m/sec.

NOTES

F-6
 CEILING DIFFUSER

SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4S) - SI UNITS

Size (mm x mm) 150 x 150 225 x 225 300 x 300 375 x 375 450 x 450 525 x 525 600 x 600
Neck Area (m­2) 0.019 0.046 0.083 0.132 0.192 0.263 0.346
Free Area (m­2) 0.009 0.021 0.036 0.055 0.077 0.102 0.128
Q (L/s) 19 46 83 132 192 263 346
Vf (m/s) 2.13 2.21 2.29 2.38 2.48 2.59 2.70
Pt (Pa) 3 2 2 2 2 2 2
1.00

Throw (m) 0.9 1.2 2.4 1.2 2.1 3.8 1.8 2.7 5.4 2.4 3.6 6.9 2.7 4.2 8.1 3.3 4.6 9.3 3.6 5.7 11.0
NC <15 <15 <15 <15 <15 <15 <15
Q (L/s) 29 69 124 198 288 395 519
Vf (m/s) 3.19 3.31 3.44 3.57 3.72 3.88 4.05
1.50

Pt (Pa) 7 3 4 4 4 4 4
Throw (m) 1.2 1.8 3.4 2.1 3.3 5.4 2.7 3.9 7.2 3.6 5.1 9.0 4.2 6.0 11.0 4.8 7.2 12.0 5.4 8.1 14.0
NC <15 <15 <15 <15 <15 16 19
Q (L/s) 38 92 166 264 384 526 691
Vf (m/s) 4.26 4.41 4.58 4.76 4.96 5.17 5.41
2.00

Pt (Pa) 13 9 8 8 8 9 9
Throw (m) 1.8 2.7 4.2 2.3 3.7 5.7 3.6 5.4 8.1 4.8 6.9 10.0 5.7 8.1 12.0 6.6 9.6 14.0 7.5 11.0 16.0
NC <15 <15 <15 18 22 25 29
Q (L/s) 43 104 187 296 432 592 778
Vf (m/s) 4.79 4.96 5.15 5.36 5.58 5.82 6.08
2.25

Pt (Pa) 17 11 11 11 11 12 12
Throw (m) 2.0 3.0 4.5 2.7 3.9 5.9 4.1 5.9 8.6 5.3 7.5 10.8 6.2 8.9 12.8 7.2 10.4 15.0 8.3 12.0 17.1
NC <15 18 17 23 28 31 35
Q (L/s) 48 115 207 329 480 658 864
Neck Velocity

Vf (m/s) 5.32 5.51 5.73 5.95 6.20 6.47 6.76

2.50

Pt (Pa) 21 14 14 14 14 16 16
Throw (m) 2.1 3.3 4.8 3.0 4.0 6.1 4.5 6.3 9.0 5.7 8.1 11.0 6.6 9.6 14.0 7.8 11.0 16.0 9.0 13.0 18.0
NC <15 21 19 28 34 37 40
Q (L/s) 52 127 228 362 528 724 951
Vf (m/s) 5.85 6.07 6.30 6.55 6.82 7.11 7.43
2.75

Pt (Pa) 29 18 18 18 18 20 20
Throw (m) 2.4 3.5 4.9 3.6 4.7 7.0 5.0 6.8 9.5 6.3 8.6 12.2 7.4 10.1 14.4 8.7 11.7 16.8 10.1 13.5 19.1
NC 17 23 22 32 37 40 43
Q (L/s) 57 138 249 395 5.76 790 1037
Vf (m/s) 6.38 6.62 6.87 7.14 7.44 7.76 8.11
3.00

Pt (Pa) 38 20 22 22 22 25 25
Throw (m) 2.7 3.6 4.9 4.2 5.4 7.8 5.4 7.2 9.9 6.9 9.0 13.0 8.1 11.0 15.0 9.6 12.0 18.0 11.0 14.0 20.0
NC 19 25 25 35 39 42 45
Q (L/s) 67 161 290 461 671 921 1210
Vf (m/s) 7.45 7.72 8.02 8.33 8.68 9.05 9.46
3.50

Pt (Pa) 41 31 32 32 32 36 36
Throw (m) 3.0 3.9 5.4 4.8 6.0 8.4 6.3 7.8 11.0 7.8 9.6 14.0 9.3 11.0 16.0 11.0 13.0 19.0 12.0 15.0 22.0
NC 22 28 32 41 44 47 50
Q (L/s) 76 184 332 527 767 1053 1383
Vf (m/s) 8.51 8.82 9.16 9.52 9.92 10.34 10.81
4.00

Pt (Pa) 52 42 43 43 43 49 49
Throw (m) 3.3 4.2 5.4 5.1 6.3 9.3 6.9 8.1 11.0 8.4 10.0 15.0 12.0 16.0 18.0 12.0 14.0 21.0 14.0 16.0 24.0
NC 24 33 36 45 48 51 53
See notes on page F-6
F-7
 CEILING DIFFUSER

SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4R) - SI UNITS

Size (mm x mm) 225 X 150 300 X 150 375 X 150 450 X 150 525 X 150 600 X 150 300 X 225
Neck Area (m­2) 0.029 0.040 0.050 0.060 0.071 0.081 0.061
Free Area (m­2) 0.014 0.018 0.022 0.026 0.030 0.034 0.027
Q (L/s) 29 40 50 60 71 81 61
Vf (m/s) 2.17 2.20 2.24 2.28 2.32 2.36 2.25
1.00

Pt (Pa) 2 2 3 3 3 3 3
Throw (m) 1.2 1.8 3.3 1.5 2.1 4.2 1.5 2.4 4.2 1.8 2.7 4.5 1.8 2.7 4.8 1.7 2.8 5.5 1.8 2.7 4.5
NC <15 <15 <15 <15 <15 <15 <15
Q (L/s) 44 60 75 91 106 122 92
Vf (m/s) 3.25 3.31 3.37 3.43 3.49 3.55 3.37
Pt (Pa) 3 3 4 4 4 4 4
1.50

Throw (m) 1.8 2.4 4.2 2.1 3.0 4.8 2.1 3.3 5.7 2.4 3.6 6.0 3.0 3.9 6.9 3.0 4.2 7.5 2.4 3.6 6.0
NC <15 <15 <15 <15 <15 <15 <15
Q (L/s) 59 79 100 121 142 162 123
Vf (m/s) 4.33 4.41 4.49 4.57 4.65 4.73 4.49
2.00

Pt (Pa) 7 8 9 9 9 9 9
Throw (m) 2.4 3.3 5.1 2.7 3.6 5.7 3.3 4.5 6.9 3.6 4.8 7.5 3.6 4.8 8.1 3.9 5.7 8.4 3.6 4.8 7.5
NC <15 <15 <15 <15 <15 <15 <15
Q (L/s) 66 89 113 136 159 183 138
Vf (m/s) 4.87 4.96 5.05 5.14 5.23 5.32 5.06
2.25

Pt (Pa) 12 11 13 13 13 13 13
Throw (m) 2.7 3.6 5.6 3.0 3.9 6.2 3.6 4.8 7.2 3.9 5.1 7.8 3.9 5.1 8.4 4.4 6.2 8.9 3.9 5.1 7.8
NC <15 15 15 15 15 16 15
Q (L/s) 73 99 125 151 177 203 153
Neck Velocity

Vf (m/s) 5.41 5.51 5.61 5.71 5.81 5.91 5.62

2.50

Pt (Pa) 17 14 17 17 17 17 17
Throw (m) 3.0 3.9 6.0 3.3 4.2 6.6 3.9 5.1 7.5 4.2 5.4 8.1 4.2 5.4 8.7 4.8 6.6 9.3 4.2 5.4 8.1
NC <15 16 16 16 16 17 16
Q (L/s) 81 109 138 166 195 223 169
Vf (m/s) 5.96 6.06 6.17 6.28 6.39 6.50 6.18
2.75

Pt (Pa) 23 22 21 21 21 21 21
Throw (m) 3.3 4.2 6.3 3.6 4.5 6.9 4.2 5.4 7.8 4.5 5.7 8.6 4.7 5.7 9.0 5.3 7.1 9.8 4.5 5.7 8.6
NC 17 19 19 20 20 21 20
Q (L/s) 88 119 150 181 212 243 184
Vf (m/s) 6.50 6.61 6.73 6.85 6.97 7.09 6.74
3.00

Pt (Pa) 29 30 26 26 26 26 26
Throw (m) 3.6 4.5 6.6 3.9 4.8 7.2 4.5 5.7 8.1 4.8 6.0 9.0 5.1 6.0 9.3 5.7 7.5 10.0 4.8 6.0 9.0
NC 20 21 22 23 23 24 23
Q (L/s) 103 139 175 212 248 284 215
Vf (m/s) 7.58 7.72 7.85 7.99 8.13 8.27 7.86
3.50

Pt (Pa) 38 38 36 36 36 36 33
Throw (m) 4.2 5.1 7.2 4.5 5.4 7.8 5.1 6.3 8.7 5.4 6.9 9.9 5.7 6.9 10.0 6.6 8.1 11.0 5.4 6.9 9.9
NC 2.6 27 28 29 29 30 29
Q (L/s) 118 159 200 242 283 325 245
Vf (m/s) 8.66 8.82 8.97 9.13 9.29 9.46 8.99
4.00

Pt (Pa) 51 51 50 50 50 50 42
Throw (m) 4.5 5.4 7.5 5.1 6.0 8.4 6.0 7.2 9.9 6.3 7.8 11.0 6.3 7.8 11.0 7.2 8.4 12.0 6.3 7.8 11.0
NC 30 31 32 33 33 34 33
See notes on page F-6 Contd....

F-8
 CEILING DIFFUSER

SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4R) - SI UNITS

Size (mm x mm) 375 x 225 450 x 225 525 x 525 600 x 225 375 x 300 450 x 300 525 x 300
Neck Area (m­2) 0.077 0.093 0.0109 0.125 0.105 0.126 0.148
Free Area (m­2) 0.034 0.040 0.046 0.052 0.047 0.053 0.061
Q (L/s) 77 93 109 125 105 126 148
Vf (m/s) 2.29 2.33 2.37 2.42 2.33 2.38 2.42
1.00

Pt (Pa) 3 3 3 3 3 3 3
Throw (m) 1.8 2.7 4.5 2.4 3.3 6.0 2.4 3.0 6.0 2.4 3.0 6.0 2.4 3.3 6.6 2.4 3.0 6.0 2.4 3.6 7.5
NC <15 <15 <15 <15 <15 <15 <15
Q (L/s) 116 140 164 188 157 189 222
Vf (m/s) 3.43 3.50 3.56 3.63 3.50 3.57 3.64
Pt (Pa) 4 4 4 4 4 4 4
1.50

Throw (m) 2.7 3.9 6.9 3.0 4.2 7.5 3.0 4.8 7.5 3.3 5.1 7.5 3.0 4.5 7.5 3.3 4.8 7.2 3.6 5.4 9.3
NC <15 <15 <15 <15 <15 <15 <15
Q (L/s) 155 187 219 250 209 252 295
Vf (m/s) 4.58 4.66 4.75 4.83 4.67 4.76 4.85
2.00

Pt (Pa) 9 9 9 9 9 9 9
Throw (m) 3.6 5.1 7.8 4.2 6.0 9.0 4.2 6.0 8.7 4.5 6.0 8.7 4.5 6.3 9.0 4.2 5.7 8.4 5.1 7.5 11.0
NC 17 <15 <15 <15 <15 <15 <15
Q (L/s) 174 210 246 282 235 284 332
Vf (m/s) 5.15 5.24 5.34 5.44 5.25 5.35 5.46
2.25

Pt (Pa) 13 13 13 13 13 13 13
Throw (m) 5.4 5.4 8.3 4.7 6.5 9.3 4.7 6.3 9.0 5.0 6.5 9.0 5.0 6.6 9.5 4.7 6.2 8.7 5.7 8.0 11.4
NC 21 16 16 17 17 17 17
Q (L/s) 193 233 273 313 261 315 369
Neck Velocity

Vf (m/s) 5.72 5.83 5.93 6.04 5.84 5.95 6.06

2.50

Pt (Pa) 17 17 17 17 17 17 17
Throw (m) 7.2 5.7 8.7 5.1 6.9 9.6 5.1 6.6 9.3 5.4 6.9 9.3 5.4 6.9 9.9 5.1 6.6 9.0 6.3 8.4 12.0
NC 24 18 18 19 19 20 20
Q (L/s) 2.13 257 300 344 287 347 406
Vf (m/s) 6.29 6.41 6.53 6.65 6.42 6.54 6.67
2.75

Pt (Pa) 21 21 21 21 21 21 21
Throw (m) 6.2 6.0 9.2 5.6 7.2 10.1 5.6 7.1 9.6 5.9 7.2 9.8 5.9 7.4 10.2 5.6 6.9 9.5 6.9 8.9 12.8
NC 27 22 22 23 23 24 24
Q (L/s) 232 280 328 376 314 378 443
Vf (m/s) 6.87 6.99 7.12 7.25 7.00 7.14 7.27
3.00

Pt (Pa) 26 26 26 26 26 26 26
Throw (m) 5.1 6.3 9.6 6.0 7.5 11.0 6.0 7.5 9.9 6.3 7.5 10.0 6.3 7.8 11.0 6.0 7.2 9.9 7.5 9.3 13.0
NC 30 25 25 26 26 27 27
Q (L/s) 271 327 382 438 366 442 517
Vf (m/s) 8.01 8.16 8.31 8.46 8.17 8.33 8.49
3.50

Pt (Pa) 33 36 36 36 36 36 36
Throw (m) 5.7 6.9 11.0 6.6 8.1 11.0 6.9 8.4 11.0 6.9 8.7 11.0 6.9 8.4 11.0 6.9 8.4 11.0 8.1 9.9 14.0
NC 34 31 31 32 32 33 33
Q (L/s) 309 373 437 501 418 505 591
Vf (m/s) 9.15 9.32 9.49 9.67 9.34 9.52 9.70
4.00

Pt (Pa) 42 50 50 50 50 50 50
Throw (m) 6.6 7.8 11.0 7.2 8.7 12.0 7.2 9.0 13.0 7.5 9.0 13.0 7.5 9.3 13.0 7.2 8.7 12.0 9.0 11.0 16.0
NC 38 35 35 36 36 37 37
See notes on page F-6 Contd....

F-9
 CEILING DIFFUSER

SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4R) - SI UNITS

Size (mm x mm) 600 x 300 450 x 375 525 x 375 600 x 375 525 x 450 600 x 450 600 x 525
Neck Area (m­2) 0.169 0.159 0.186 0.213 0.225 0.258 0.302
Free Area (m­2) 0.069 0.066 0.075 0.084 0.089 0.100 0.114
Q (L/s) 169 159 186 213 225 258 302
Vf (m/s) 2.47 2.43 2.48 2.53 2.53 2.58 2.64
1.00

Pt (Pa) 3 3 3 3 3 3 2
Throw (m) 2.4 3.3 7.2 2.4 3.3 7.2 2.7 3.9 7.8 2.7 4.5 8.7 2.4 4.2 7.8 3.3 4.8 9.3 3.3 5.1 9.9
NC <15 <15 <15 <15 <15 <15 <15
Q (L/s) 254 238 279 320 337 386 452
Vf (m/s) 3.71 3.65 3.72 3.79 3.80 3.88 3.96
Pt (Pa) 4 4 4 4 4 4 4
1.50

Throw (m) 3.9 6.0 9.3 3.9 6.0 9.3 3.9 6.3 9.3 4.2 6.3 11.0 4.2 6.0 11.0 4.8 7.2 12.0 5.4 7.8 13.0
NC <15 <15 <15 <15 <15 <15 <15
Q (L/s) 339 317 372 427 449 515 603
Vf (m/s) 4.94 4.85 4.95 5.05 5.06 5.17 5.29
2.00

Pt (Pa) 9 9 9 9 9 9 9
Throw (m) 5.7 7.8 11.0 5.7 7.8 11.0 6.0 8.1 12.0 6.0 8.7 13.0 5.7 8.4 13.0 6.6 9.6 14.0 6.9 10.0 15.0
NC <15 <15 <15 <15 <15 <15 15
Q (L/s) 381 358 419 480 506 579 679
Vf (m/s) 5.56 5.46 5.57 5.68 5.69 5.81 5.95
2.25

Pt (Pa) 13 13 13 13 13 13 12
Throw (m) 6.3 8.3 12.2 6.3 8.3 12.2 6.6 8.6 12.6 6.6 9.3 13.4 6.3 8.9 13.1 7.5 10.4 14.9 7.8 11.0 15.8
NC 18 18 18 18 18 19 20
Q (L/s) 423 398 466 534 562 644 754
Neck Velocity

Vf (m/s) 6.18 6.06 6.19 6.32 6.33 6.46 6.61

2.50

Pt (Pa) 17 17 17 17 17 17 16
Throw (m) 6.9 8.7 13.0 6.9 8.7 13.0 7.2 9.0 13.0 7.2 9.9 14.0 6.9 9.3 14.0 8.4 11.0 16.0 8.7 12.0 17.0
NC 21 21 21 22 22 23 24
Q (L/s) 466 437 512 587 618 708 830
Vf (m/s) 6.80 6.67 6.81 6.95 6.96 7.11 7.27
2.75

Pt (Pa) 21 21 21 21 21 21 20
Throw (m) 7.4 9.2 13.5 7.4 9.2 13.5 7.5 9.5 13.8 8.1 10.5 15.0 7.8 9.8 14.3 9.2 11.9 16.7 9.6 12.2 17.4
NC 25 21 25 26 26 27 28
Q (L/s) 508 559 559 640 674 773 905
Vf (m/s) 7.41 7.28 7.43 7.58 7.59 7.75 7.93
3.00

Pt (Pa) 26 26 26 26 26 26 25
Throw (m) 7.8 9.6 14.0 7.8 9..6 14.0 7.8 9.9 14.0 9.0 11.0 16.0 8.7 10.0 15.0 9.9 130 18.0 11.0 13.0 18.0
NC 28 28 28 29 29 30 31
Q (L/s) 593 557 652 747 786 901 1056
Vf (m/s) 8.65 8.67 8.67 8.84 8.86 9.04 9.25
3.50

Pt (Pa) 36 36 36 36 36 36 36
Throw (m) 8.4 11.0 15.0 8.4 11.0 15.0 8.4 11.0 16.0 12.0 16.0 17.0 12.0 15.0 17.0 11.0 14.0 18.0 11.0 14.0 20.0
NC 34 34 34 35 36 36 37
Q (L/s) 677 636 745 854 899 1030 1207
Vf (m/s) 9.88 9.71 9.91 10.11 10.12 10.34 10.57
4.00

Pt (Pa) 50 50 50 50 50 50 49
Throw (m) 9.0 11.0 17.0 9.0 11.0 17.0 9.3 12.0 18.0 13.0 17.0 18.0 14.0 17.0 19.0 12.0 15.0 20.0 12.0 15.0 22.0
NC 38 38 38 39 39 40 41

See notes on page F-6

F-10
 CEILING DIFFUSER

RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4S) - SI UNITS

Size Neck Neck Velocity
1.00 1.50 2.00 2.25 2.50 2.75 3.00 3.50 4.00
(mm x mm) Area (m2) (m/s)
Q (L/s) 19 29 38 43 48 52 57 67 76
150 X 150 0.019 Pt (Pa) 8 12 18 20 21 22 24 35 45
NC <15 <15 <15 <15 <15 15 15 21 25
Q (L/s) 45 68 91 102 113 125 136 159 181
225 X 225 0.045 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 <15 18 22 26 30 36 41
Q (L/s) 83 124 166 187 207 228 249 290 332
300 X 300 0.083 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 16 21 26 30 33 39 45
Q (L/s) 132 198 264 296 329 362 395 461 527
375 X 375 0.132 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 15 19 24 28 32 36 42 47
Q (L/s) 192 288 384 432 480 528 576 671 767
450 X 450 0.192 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 16 18 21 26 31 35 38 44 50
Q (L/s) 263 395 526 592 658 724 790 921 1053
525 X 525 0.263 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 18 21 23 28 33 37 40 46 52
Q (L/s) 346 519 691 778 864 951 1037 1210 1383
600 X 600 0.346 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 19 22 24 29 34 38 42 48 53
See notes on page F-6

F-11
 CEILING DIFFUSER

RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4R) - SI UNITS

Neck Velocity
Size (mm x mm) Neck Area (m2­) 1.00 1.50 2.00 2.25 2.50 2.75 3.00 3.50 4.00
(m/s)
Q (L/s) 29 44 59 66 73 81 88 103 118
225 X 150 0.029 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 <15 17 19 24 28 33 38
Q (L/s) 40 60 79 89 99 109 119 139 159
300 X 150 0.040 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 <15 18 21 25 29 34 40
Q (L/s) 50 75 100 113 125 138 150 175 200
375 X 150 0.050 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 <15 19 23 27 31 36 42
Q (L/s) 60 91 121 136 151 166 181 212 242
450 X 150 0.060 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 16 20 24 28 32 37 43
Q (L/s) 71 106 142 159 177 195 212 248 283
525 X 150 0.071 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 16 21 25 29 33 38 44
Q (L/s) 81 122 162 183 203 223 243 284 325
600 X 150 0.081 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 17 21 25 29 32 39 45
Q (L/s) 61 92 123 138 153 169 184 215 245
300 X 225 0.061 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 16 20 24 28 32 37 43
Q (L/s) 77 116 155 174 193 213 232 271 309
375 X 225 0.077 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 17 22 26 30 33 38 45
Q (L/s) 93 140 187 210 233 257 280 327 373
450 X 225 0.093 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 17 22 27 31 34 40 46
Q (L/s) 77 116 155 174 193 213 232 271 309
375 X 225 0.077 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 <15 17 22 26 30 33 38 45
Q (L/s) 109 164 219 246 273 300 328 382 437
525 X 225 0.109 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 15 18 23 27 31 35 41 46
Q (L/s) 125 188 250 282 313 344 376 438 501
600 X 225 0.125 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 16 19 24 28 32 36 42 47
Q (L/s) 105 157 209 235 261 287 314 366 418
375 X 300 0.105 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 15 18 23 27 31 34 40 46
Q (L/s) 126 189 252 284 315 347 378 442 505
450 X 300 0.126 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 15 19 24 28 32 36 42 47
See notes on page F-6 Contd....

F-12
 CEILING DIFFUSER

RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4R) - SI UNITS

Neck Velocity
Size (mm x mm) Neck Area (m2­) 1.00 1.50 2.00 2.25 2.50 2.75 3.00 3.50 4.00
(m/s)
Q (L/s) 148 222 295 332 369 406 443 517 591
525 X 300 0.148 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC <15 16 20 25 29 33 37 42 48
Q (L/s) 169 254 339 381 423 466 508 593 677
600 X 300 0.169 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 15 18 21 26 30 34 37 43 49
Q (L/s) 159 238 318 358 397 437 477 556 636
450 X 375 0.159 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 15 17 20 25 29 33 37 43 49
Q (L/s) 186 279 372 419 466 512 559 652 745
525 X 375 0.186 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 16 18 21 26 31 35 38 44 50
Q (L/s) 213 320 427 480 534 587 640 747 854
600 X 375 0.213 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 17 18 22 27 32 36 39 45 51
Q (L/s) 225 337 449 506 562 618 674 786 899
525 X 450 0.225 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 17 19 22 27 32 36 39 45 51
Q (L/s) 258 386 515 579 644 708 773 901 1030
600 X 450 0.258 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 18 20 23 28 33 37 40 46 52
Q (L/s) 302 452 603 679 754 830 905 1056 1207
600 X 525 0.302 Pt (Pa) 10 14 20 22 23 30 37 55 75
NC 18 21 24 29 34 38 41 47 53
See notes on page F-6

F-13
 CEILING DIFFUSER

PERFORMANCE DATA - IP UNITS

Symbols Conditions
CFM : Air Volume in cubic feet per minute Supply or Return as indicated.
Af : Effective free area in square feet Noise Criteria values are based on (10dB) room attenuation.
Vf : Face Velocity in feet per minute Damper is fully open.
Ak : Neck Area in square feet Maximum room height = 4.0m
Vk : Neck Velocity in feet per minute Maximum Cooling @ ∆T = 10K
Pt : Total pressure in inches water gauge Correction for 1, 2 and 3 way
Th : Throw in feet Noise Criteria : No correction required.
NC : Noise Criteria Pressure : No correction required.
Notes Throw : 3 way - increase for 15%
The large throw values are based on the minimum terminal : 2 way - increase for 25%
velocity of 50fpm. : 1 way - increase for 45%
The middle throw values are based on the medium terminal Drop : No correction required.
velocity of 100 fpm.
The small throw values are based on the maximum terminal
velocity of 150fpm

NOTES

F-14
 CEILING DIFFUSER

SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4S) - IP UNITS

Size (in x in) 6x6 9x9 12 x 12 15 x 15 18 x 18 21 x 21 24 x 24

Neck Area (ft2) 0.205 0.495 0.893 1.418 2.065 2.833 3.722
Free Area (ft2) 0.096 0.221 0.390 0.595 0.832 1.095 1.376
Q (CFM) 40 98 176 279 407 558 733
Vf (fpm) 426 441 458 476 496 517 541
Pt (in-wg) 0.014 0.008 0.010 0.010 0.010 0.010 0.010
200

Throw (ft) 3 4 8 4 7 12 6 9 18 8 12 23 9 14 27 11 15 31 12 19 35
NC <15 <15 <15 <15 <15 <15 <15
Q (CFM) 61 146 264 419 610 837 1099
Vf (fpm) 638 662 687 714 744 776 811
300

Pt (in-wg) 0.030 0.014 0.015 0.015 0.015 0.015 0.015

Throw (ft) 4 6 11 7 11 18 9 13 24 12 17 30 14 20 34 16 24 40 18 27 46
NC <15 <15 <15 <15 <15 16 19
Q (CFM) 81 195 352 559 813 1116 1466
Vf (fpm) 851 882 916 952 992 1034 1081
400

Pt (in-wg) 0.054 0.036 0.032 0.032 0.032 0.036 0.036

Throw (ft) 6 9 14 8 12 19 12 18 27 16 23 33 19 27 39 22 31 46 25 36 53
NC <15 <15 <15 18 22 25 29
Q (CFM) 91 219 396 629 915 1255 1649
Vf (fpm) 957 993 1031 1071 1116 1164 1216
450

Pt (in-wg) 0.069 0.043 0.045 0.045 0.045 0.050 0.050

Throw (ft) 6 10 15 9 13 19 13 19 28 17 25 35 20 29 42 24 34 49 27 39 56
NC <15 16 17 23 28 31 35
Neck Velocity (fpm)

Q (CFM) 101 244 440 698 1017 1395 1832

Vf (fpm) 1064 1103 1145 1190 1240 1293 1351
500

Pt (in-wg) 0.083 0.055 0.058 0.058 0.058 0.063 0.063

Throw (ft) 7 11 16 10 13 20 15 21 30 19 27 37 22 31 44 26 36 52 30 42 59
NC <15 17 19 28 34 37 40
Q (CFM) 111 268 484 768 1118 1534 2016
Vf (fpm) 1170 1213 1260 1310 1364 1422 1486
550

Pt (in-wg) 0.118 0.072 0.074 0.074 0.074 0.082 0.082

Throw (ft) 8 11 16 12 15 23 16 22 31 21 28 40 24 33 47 29 38 55 33 44 63
NC 17 20 22 32 37 40 43
Q (CFM) 121 293 528 838 1220 1674 2199
Vf (fpm) 1277 1324 1374 1429 1488 1552 1622
600

Pt (in-wg) 0.152 0.080 0.090 0.090 0.090 0.100 0.100

Throw (ft) 9 12 16 14 18 26 18 24 32 23 30 42 27 34 50 31 40 58 36 46 66
NC 19 22 25 35 39 42 45
Q (CFM) 141 341 615 978 1423 1953 2565
Vf (fpm) 1489 1544 1603 1667 1736 1810 1892
700

Pt (in-wg) 0.164 0.123 0.129 0.129 0.129 0.143 0.143

Throw (ft) 10 13 18 16 20 28 21 26 35 26 31 45 31 37 53 35 43 62 40 50 71
NC 22 28 32 41 44 47 50
Q (CFM) 161 390 703 1117 1627 2232 2932
Vf (fpm) 1702 1765 1832 1905 1983 2069 2162
800

Pt (in-wg) 0.209 0.168 0.174 0.174 0.174 0.196 0.196

Throw (ft) 11 14 18 17 21 31 23 27 37 28 33 49 40 53 58 38 46 68 44 53 78
NC 24 33 36 45 48 51 53
See notes on page F-14
F-15
 CEILING DIFFUSER

SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4R) - IP UNITS

Size (in x in) 9X6 12 X 6 15 X 6 18 X 6 21 X 6 24 X 6 12 X 9

Neck Area (ft2) 0.316 0.428 0.539 0.651 0.762 0.874 0.660
Free Area (ft2) 0.146 0.194 0.240 0.285 0.328 0.369 0.294
Q (CFM) 62 84 106 128 150 172 130
Vf (fpm) 433 441 449 457 465 473 449
200

Pt (in-wg) 0.008 0.008 0.010 0.010 0.010 0.010 0.010

Throw (ft) 4 6 11 5 7 14 5 8 14 6 9 15 6 9 16 6 9 18 6 9 15
NC <15 <15 <15 <15 <15 <15 <15
Q (CFM) 93 126 159 192 225 258 195
Vf (fpm) 650 661 673 685 697 709 674
300

Pt (in-wg) 0.014 0.014 0.014 0.014 0.014 0.014 0.014

Throw (ft) 6 8 14 7 10 16 7 11 19 8 12 20 10 13 23 10 14 25 8 12 20
NC <15 <15 <15 <15 <15 <15 <15
Q (CFM) 125 169 212 256 300 344 260
Vf (fpm) 866 882 897 913 929 946 899
400

Pt (in-wg) 0.029 0.031 0.037 0.037 0.037 0.037 0.037

Throw (ft) 8 11 17 9 12 19 11 15 23 12 16 25 12 16 27 13 19 28 12 16 25
NC <15 <15 <15 <15 <15 <15 <15
Q (CFM) 140 190 239 288 338 387 293
Vf (fpm) 975 992 1010 1028 1046 1064 1011
450

Pt (in-wg) 0.049 0.043 0.052 0.052 0.052 0.052 0.052

Throw (ft) 9 12 18 10 13 20 12 16 24 13 17 26 13 17 28 14 20 29 13 17 26
NC <15 15 15 15 15 16 15
Neck Velocity (fpm)

Q (CFM) 156 211 265 320 375 430 325

Vf (fpm) 1083 1102 1122 1142 1162 1182 1123
500

Pt (in-wg) 0.069 0.055 0.066 0.066 0.066 0.066 0.066

Throw (ft) 10 13 20 11 14 22 13 17 25 14 18 27 14 18 29 16 22 31 14 18 27
NC <15 16 16 16 16 17 16
Q (CFM) 171 232 292 352 413 473 358
Vf (fpm) 1191 1212 1234 1256 1278 1300 1236
550

Pt (in-wg) 0.094 0.087 0.085 0.085 0.085 0.085 0.085

Throw (ft) 11 14 21 12 15 23 14 18 26 15 19 28 15 19 30 17 23 32 15 19 28
NC 17 19 19 20 20 21 20
Q (CFM) 187 253 319 384 450 516 390
Vf (fpm) 1299 1323 1346 1370 1394 1419 1348
600

Pt (in-wg) 0.118 0.119 0.104 0.104 0.104 0.104 0.104

Throw (ft) 12 15 22 16 16 24 15 19 27 16 20 30 17 20 31 19 25 33 16 20 30
NC 20 21 22 23 23 24 23
Q (CFM) 218 295 372 448 525 602 455
Vf (fpm) 1516 1543 1571 1598 1627 1655 1573
700

Pt (in-wg) 0.152 0.152 0.145 0.145 0.145 0.145 0.134

Throw (ft) 14 17 24 15 18 26 17 21 29 18 23 32 19 23 33 22 27 36 18 23 32
NC 26 27 28 29 29 30 29
Q (CFM) 249 337 425 513 600 688 520
Vf (fpm) 1733 1764 1795 1827 1859 1891 1797
800

Pt (in-wg) 0.207 0.207 0.199 0.199 0.199 0.199 0.170

Throw (ft) 15 18 25 17 20 28 20 24 32 21 26 36 21 26 36 24 28 38 21 26 36
NC 30 31 32 33 33 34 33
See notes on page F-14 Contd....

F-16
 CEILING DIFFUSER

SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4R) - IP UNITS

Size (in x in) 15 X 9 18 X 9 21 X 9 24 X 9 15 X 12 18 X 12 21 X 12

Neck Area (ft2) 0.832 1.004 1.176 1.348 1.125 1.358 1.590
Free Area (ft2) 0.363 0.431 0.495 0.558 0.482 0.570 0.656
Q (CFM) 164 198 232 266 222 267 313
Vf (fpm) 458 466 475 483 467 476 485
200

Pt (in-wg) 0.010 0.010 0.010 0.010 0.010 0.010 0.010

Throw (ft) 6 9 15 8 11 20 8 10 20 8 10 20 8 11 22 8 10 20 8 12 25
NC <15 <15 <15 <15 <15 <15 <15
Q (CFM) 246 297 347 398 332 401 470
Vf (fpm) 687 699 712 725 700 714 727
300

Pt (in-wg) 0.014 0.014 0.014 0.014 0.014 0.014 0.014

Throw (ft) 9 13 23 10 14 25 10 16 25 11 17 25 10 15 25 11 16 24 12 18 31
NC <15 <15 <15 <15 <15 <15 <15
Q (CFM) 328 396 463 531 443 535 626
Vf (fpm) 915 932 949 967 934 952 970
400

Pt (in-wg) 0.037 0.037 0.037 0.037 0.037 0.037 0.037

Throw (ft) 12 17 26 14 20 30 14 20 29 15 20 29 15 21 30 14 19 28 17 25 34
NC 17 <15 <15 <15 <15 <15 <15
Q (CFM) 369 445 521 597 499 602 705
Vf (fpm) 1030 1049 1068 1088 1050 1071 1091
450

Pt (in-wg) 0.052 0.052 0.052 0.052 0.052 0.052 0.052

Throw (ft) 18 18 27 15 21 31 15 21 30 16 21 30 16 22 31 15 20 29 19 26 37
NC 21 16 16 17 17 17 17
Neck Velocity (fpm)

Q (CFM) 410 494 579 664 554 669 783

Vf (fpm) 1144 1165 1187 1208 1167 1190 1212
500

Pt (in-wg) 0.066 0.066 0.066 0.066 0.066 0.066 0.066

Throw (ft) 24 19 29 17 23 31 17 22 31 18 23 31 18 23 32 17 22 30 21 28 40
NC 24 18 18 19 19 20 20
Q (CFM) 451 544 637 730 609 735 861
Vf (fpm) 1259 1282 1305 1329 1284 1308 1334
550

Pt (in-wg) 0.085 0.085 0.085 0.085 0.085 0.085 0.085

Throw (ft) 20 20 30 18 24 33 18 23 31 19 24 32 19 24 33 18 23 31 23 29 42
NC 27 22 22 23 23 24 24
Q (CFM) 492 593 695 797 665 802 940
Vf (fpm) 1373 1398 1424 1450 1401 1427 1455
600

Pt (in-wg) 0.104 0.104 0.104 0.104 0.104 0.104 0.104

Throw (ft) 17 21 31 20 25 34 20 25 32 21 25 33 21 26 34 20 24 32 25 31 43
NC 30 25 25 26 26 27 27
Q (CFM) 574 692 811 929 776 936 1096
Vf (fpm) 1602 1631 1661 1692 1634 1665 1697
700

Pt (in-wg) 0.134 0.145 0.145 0.145 0.145 0.145 0.145

Throw (ft) 19 23 34 22 27 36 23 28 36 23 29 36 23 28 36 23 28 35 27 32 47
NC 34 31 31 32 32 33 33
Q (CFM) 656 791 927 1062 887 1070 1253
Vf (fpm) 1831 1865 1899 1933 1867 1903 1940
800

Pt (in-wg) 0.170 0.199 0.199 0.199 0.199 0.199 0.199

Throw (ft) 22 26 37 24 29 39 24 30 42 25 30 42 25 31 41 24 29 40 30 35 51
NC 38 35 35 36 36 37 37
See notes on page F-14 Contd....

F-17
 CEILING DIFFUSER

SUPPLY AIR CEILING DIFFUSER, 4 WAY - (SCD - 4R) - IP UNITS

Size (in x in) 24 X 12 18 X 15 21 X 15 24 X 15 21 X 18 24 X 18 24 X 21

Neck Area (ft2) 1.823 1.712 2.005 2.298 2.419 2.772 3.247
Free Area (ft2) 0.737 0.709 0.809 0.909 0.955 1.072 1.228
Q (CFM) 359 337 395 453 476 546 639
Vf (fpm) 494 485 495 505 506 517 529
200

Pt (in-wg) 0.010 0.010 0.010 0.010 0.010 0.010 0.010

Throw (ft) 8 11 24 8 11 24 9 13 26 9 15 29 8 14 26 11 16 31 11 17 32
NC <15 <15 <15 <15 <15 <15 <15
Q (CFM) 539 505 592 679 715 819 959
Vf (fpm) 741 720 743 758 759 775 793
300

Pt (in-wg) 0.014 0.014 0.014 0.014 0.014 0.014 0.015

Throw (ft) 13 20 31 13 20 31 13 21 31 14 21 35 14 20 34 16 24 40 18 26 41
NC <15 <15 <15 <15 <15 <15 <15
Q (CFM) 718 675 790 905 953 1092 1279
Vf (fpm) 988 971 991 1011 1012 1034 1057
400

Pt (in-wg) 0.037 0.037 0.037 0.037 0.037 0.037 0.036

Throw (ft) 19 26 37 19 26 37 20 27 39 20 29 41 19 28 41 22 31 46 23 33 48
NC <15 <15 <15 <15 <15 <15 15
Q (CFM) 808 758 888 1018 1072 1228 1439
Vf (fpm) 1112 1093 1115 1137 1139 1163 1189
450

Pt (in-wg) 0.052 0.052 0.052 0.052 0.052 0.052 0.050

Throw (ft) 21 27 40 21 27 40 22 28 41 22 31 44 21 29 43 25 34 49 26 36 52
NC 18 18 18 18 18 19 20
Neck Velocity (fpm)

Q (CFM) 898 843 987 1131 1191 1365 1599

Vf (fpm) 1235 1215 1239 1263 1266 1292 1321
500

Pt (in-wg) 0.066 0.066 0.066 0.066 0.066 0.066 0.063

Throw (ft) 23 29 42 23 29 42 24 30 43 24 32 46 23 31 44 28 36 51 29 38 55
NC 21 21 21 22 22 23 24
Q (CFM) 987 928 1086 1244 1310 1501 1759
Vf (fpm) 1359 1334 1362 1390 1392 1421 1453
550

Pt (in-wg) 0.085 0.085 0.085 0.085 0.085 0.085 0.082

Throw (ft) 24 30 44 24 30 44 25 31 45 27 34 49 26 32 47 30 39 55 31 40 57
NC 25 25 25 26 26 27 28
Q (CFM) 1077 1010 1184 1358 1429 1638 1918
Vf (fpm) 1483 1456 1486 1516 1519 1550 1586
600

Pt (in-wg) 0.104 0.104 0.104 0.104 0.104 0.104 0.100

Throw (ft) 26 31 46 26 31 46 26 32 47 30 36 52 29 34 49 32 41 58 34 41 59
NC 28 28 28 29 29 30 31
Q (CFM) 1257 1180 1382 1584 1667 1911 2238
Vf (fpm) 1730 1699 1734 1769 1772 1809 1850
700

Pt (in-wg) 0.145 0.145 0.145 0.145 0.145 0.145 0.143

Throw (ft) 28 34 50 28 34 50 28 35 52 39 51 56 39 50 56 36 45 60 37 44 65
NC 34 34 34 35 36 36 37
Q (CFM) 1436 1348 1579 1810 1905 2184 2558
Vf (fpm) 1977 1943 1982 2021 2025 2067 2114
800

Pt (in-wg) 0.199 0.199 0.199 0.199 0.199 0.199 0.196

Throw (ft) 30 37 55 30 37 55 31 38 58 42 54 60 44 55 62 40 48 67 40 48 71
NC 38 38 38 39 39 40 41
See notes on page F-14

F-18
 CEILING DIFFUSER

RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4S) - SI UNITS

Size Neck Neck Velocity

200 300 400 450 500 550 600 700 800
(in x in) Area (ft2) (fpm)
Q (CFM) 40 61 81 91 101 111 121 141 161
6x6 0.205 Pt (in-wg) 0.032 0.048 0.072 0.078 0.084 0.090 0.095 0.141 0.181
NC <15 <15 <15 <15 <15 15 15 21 25
Q (CFM 96 144 192 216 240 265 289 337 385
9x9 0.488 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 <15 18 22 26 30 36 41
Q (CFM) 176 264 352 396 440 484 528 615 703
12 x 12 0.893 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 16 21 26 30 33 39 45
Q (CFM 279 419 559 629 698 768 838 978 1117
15 x 15 1.418 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 15 19 24 28 32 36 42 47
Q (CFM) 407 610 813 915 1017 1118 1220 1423 1627
18 x 18 2.065 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 16 18 21 26 31 35 38 44 50
Q (CFM 558 837 1116 1255 1395 1534 1674 1953 2232
21 x 21 2.833 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 18 21 23 28 33 37 40 46 52
Q (CFM) 733 1099 1466 1648 1832 2015 2199 2565 2932
24 x 24 3.722 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 19 22 24 29 34 38 42 48 53
See notes on page F-14

F-19
 CEILING DIFFUSER

RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4R) - IP UNITS

Size (in x Neck Area Neck Velocity

200 300 400 450 500 550 600 700 800
in) (ft2) (fpm)
Q (CFM) 62 93 125 140 156 171 187 218 249
9X6 0.0316 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 <15 17 19 24 28 33 38
Q (CFM) 84 126 169 190 211 232 253 295 337
12 X 6 0.428 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 <15 18 21 25 29 34 40
Q (CFM) 106 159 212 239 265 292 319 372 425
15 X 6 0.539 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 <15 19 23 27 31 36 42
Q (CFM) 128 192 256 288 320 352 384 448 513
18 X 6 0.651 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 16 20 24 28 32 37 43
Q (CFM) 150 225 300 338 375 413 450 525 600
21 X 6 0.0762 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 16 21 25 29 33 38 44
Q (CFM) 172 258 344 387 430 473 516 602 688
24 X 6 0.874 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 17 21 25 29 32 39 45
Q (CFM) 130 195 260 293 325 358 390 455 520
12 X 9 0.660 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 16 20 24 28 32 37 43
Q (CFM) 164 246 328 369 410 451 492 574 656
15 X 9 0.832 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 17 22 26 30 33 38 45
Q (CFM) 198 297 396 445 494 544 593 692 791
18 X 9 1.004 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 <15 17 22 27 31 34 40 46
Q (CFM) 232 347 463 521 579 637 695 811 927
21 X 9 1.176 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 15 18 23 27 31 35 41 46
Q (CFM) 266 398 531 597 664 730 797 929 1062
24 X 9 1.348 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 16 19 24 28 32 36 42 47
Q (CFM) 222 332 442 498 553 608 665 775 885
15 X 12 1.129 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 15 18 23 27 31 34 40 46
Q (CFM) 267 401 535 602 669 735 802 936 1070
18 X 12 1.358 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 15 19 24 28 32 36 42 47
Q (CFM) 313 470 626 705 783 861 940 1096 1253
21 X 12 1.590 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC <15 16 20 25 29 33 37 42 48
See notes on page F-14 Contd....

F-20
 CEILING DIFFUSER

RETURN AIR CEILING DIFFUSER, 4 WAY - (RCD - 4R) - IP UNITS

Size (in x Neck Area Neck Velocity

200 300 400 450 500 550 600 700 800
in) (ft2) (fpm)
Q (CFM) 359 539 718 808 898 987 1077 1257 1436
24 x 12 1.823 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 15 18 21 26 30 34 37 43 49
Q (CFM) 337 506 674 758 843 927 1011 1180 1348
18 x 15 1.712 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 15 17 20 25 29 33 37 43 49
Q (CFM) 395 592 790 887 987 1085 1184 1382 1579
21 x 15 2.005 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 16 18 21 26 31 35 38 44 50
Q (CFM) 453 679 905 1018 1131 1243 1358 1584 1810
24 x 15 2.298 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 17 18 22 27 32 36 39 45 51
Q (CFM) 476 715 953 1072 1191 1309 1429 1667 1905
21 x 18 2.419 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 17 19 22 27 32 36 39 45 51
Q (CFM) 546 819 1092 1227 1365 1501 1638 1911 2184
24 x 18 2.772 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 18 20 23 28 33 37 40 46 52
Q (CFM) 639 959 1279 1438 1599 1759 1918 2238 2558
24 x 21 3.247 Pt (in-wg) 0.040 0.056 0.080 0.086 0.092 0.120 0.149 0.221 0.301
NC 18 21 24 29 34 38 41 47 53
See notes on page F-14

F-21
PLAQUE CEILING
DIFFUSER
G
We Care For The Air You Breathe

www.flowtechind.com Part of
 PLAQUE CEILING DIFFUSER

Plaque Ceiling Diffuser Index

SUPPLY PLAQUE CEILING DIFFUSER-ROUND INLET (SPLCD-R) & RETURN PLAQUE CEILING DIFFUSER-ROUND INLET (RPLCD-R) G1

PRODUCTS FEATURES G1

STANDARD SIZES G1

SUPPLY PLAQUE CEILING DIFFUSER-SQUARE INLET (SPLCD-S) & RETURN PLAQUE CEILING DIFFUSER-SQUARE INLET (RPLCD-S) G1

PRODUCTS FEATURES G1

STANDARD SIZES G1

FINISH OPTIONS / FIXING G2

ACCESSORIES G2

ORDERING SYSTEM G3

GENERAL NOTES G3

PERFORMANCE DATA - SI UNITS - NOTES, SYMBOLS, CONDITIONS G4

PERFORMANCE DATA G5

THROW DIAGRAM G5
 PLAQUE CEILING DIFFUSER

SUPPLY PLAQUE CEILING DIFFUSER-ROUND INLET (SPLCD-R) & SUPPLY PLAQUE CEILING DIFFUSER-SQUARE INLET (SPLCD-S) &
RETURN PLAQUE CEILING DIFFUSER-ROUND INLET (RPLCD-R) RETURN PLAQUE CEILING DIFFUSER-SQUARE INLET (RPLCD-S)

Flowtech provides a range of Flowtech provides a range of

plaque diffusers to suit the plaque diffusers to suit
requirement of ceiling air the requirement of ceiling air
distribution. distribution.
Plaque diffusers face is square in Plaque diffusers face is square in
shape. And the neck of the plaque shape. And the neck of the plaque
diffuser can be either. the round diffuser can be either. the round
inlet or the square inlet. inlet or the square inlet.
Plaque diffusers are commonly used for heating, cooling Plaque diffusers are commonly used for heating, cooling
and isothermal ventilation application and are used to deliver and isothermal ventilation application and are used to deliver
360o radial, horizontal air flow pattern. 360O radial, horizontal air flow pattern.
The core shall be one piece die-formed design with smooth, The core shall be one piece die-formed design with smooth,
aerodynamically designed surfaces and no corner joints aerodynamically designed surfaces and no corner joints

This contoured design shall protect the ceiling and help to This contoured design shall protect the ceiling and help
prevent smudging & streaking. to prevent smudging & streaking.

The corners of the frames are mechanically pressed. The corners of the frames are mechanically pressed.

PRODUCTS FEATURES PRODUCTS FEATURES

Negligible resistance to air flow Negligible resistance to air flow
Less dirt accumulation Less dirt accumulation
The core can be easily removable for cleaning or servicing if necessary The core can be easily removable for cleaning or servicing if necessary
Manufactured from aluminium sheets in one piece. (No joints Manufactured from aluminium sheets in one piece. (No joints
/ gaps at corners) / gaps at corners)
Available as 4-way supply and return diffuser. (With or without Available as 4-way supply and return diffuser. (With or without
opposed blade damper) opposed blade damper)
Powder coated in RAL 9010 or 9016 as standard Powder coated in RAL 9010 or 9016 as standard
Other powder coated color finishes are available on request. Other powder coated color finishes are available on request.

STANDARD SIZES STANDARD SIZES

FACE SIZE NECK SIZE (INCH) Neck Size Face Size
603 X 603 (233/4 X 233/4) 6” 150 X 150 295 X 295
603 X 603 (233/4 X 233/4) 8”
225 X 225 370 X 370
603 X 603 (233/4 X 233/4) 10”
603 X 603 (233/4 X 233/4) 12” 300 X 300 445 X 445
603 X 603 (233/4 X 233/4) 14” 375 X 375 520 X 520
450 X 450 595 X 595

Gasket (Optional)

G-1
 PLAQUE CEILING DIFFUSER

FINISH OPTIONS / FIXING ACCESSORIES

Available in Powder Coated RAL 9010 or 9016 as standard. Equalizing grid (optional)
Other powder coated color finishes are available on request.
Individually adjustable blades, to provide precise directional
Fixing options are Concealed Screw Fixing. control of air through the diffuser.
Nylon tension bushes.
Fixing
Extruded aluminium construction.
4 holes 8mm diameter for straps or drop rods.
Opposed blade damper for supply (optional)
The specially designed blades have an overlapping lip which
assures a tight closure.
Control is done by adjustment screw through the face of diffuser.
Material: Extruded aluminium construction.
Standard Fixing (CSF)

Circular duct connection adaptors (optional)

Suitable for supply and exhaust ceiling diffusers.
Round inlet.
Galvanized steel construction. Opposed Blade Damper For Supply (OBD)
Special construction available on request.

RT - Square to round adaptor. Top inlet RS - Square to round adaptor without perforated plate. Side inlet.

RSP - Square to round adaptor with perforated plate. Side inlet RSI- Insulated square to round adaptor with perforated plate. Side inlet
Type RS Type RT
Nominal Size ØD
H1 H2 H3 H4
150 X 150 100 240 285 150 195
225 X 225 150 290 335 175 220
300 X 300 200 340 385 200 245
375 X 375 250 390 435 225 270
450 X 450 300 440 485 250 295
525 X 525 350 490 535 275 320
600 X 600 400 540 585 300 345

G-2
 PLAQUE CEILING DIFFUSER

ORDERING SYSTEM

A XB
RAL Code Color

Width in mm or inch

Length in mm or inch

SPLCD-S : Supply Plaque Ceiling Diffuser - Square Inlet

RPLCD-S : Return Plaque Ceiling Diffuser - Square Inlet
SPLCD-R : Supply Plaque Ceiling Diffuser - Round Inlet
RPLCD-R : Return Plaque Ceiling Diffuser - Round Inlet
Ordering Example
SPLCD-S-300mm x 300mm-9010
Supply Plaque Ceiling Diffuser - Square Inlet, 300x300 coating color RAL 9010.

GENERAL NOTES
Pages onwards give performance data for all models and variants, and unless otherwise stated the following general notes apply:

1. Throws shown are to three terminal velocity of 0.25m/s, 0.5m/s, 6. NC and Pressure values shown, are based on a diffuser complete
0.75m/s, (50fpm, 100fpm, 150fpm) with coanda effect across a flat unit with an opposed blade damper in the fully open position for
ceiling, and with supply air at conditions with max ∆T=10K cooling. the supply diffuser and without for the return diffuser. The damper
should only be used for fine balancing, as for every doubling of
2. For standard room height of 2.75 metres, throws should be taken pressure there is a resulting increase in the noise level of +9dB for
as the distance to the nearest wall (minimum plan dimension, MPD), supply, or +5dB for exhaust.
or to half the distance between diffuser centres.
There is a ‘dilution effect’ on performance for these models, as the air
3. When mounted without a surrounding closed ceiling, the throw tends to spread behind the core, reducing throws by up to 20% depending
will be reduced by approx. 40%, ie throw = table throw x 0.6 on the relationship between the neck size and the base diffuser size. For
more information, please check with the factory.
However, in order to avoid the airflow ‘dumping’into the
space when on cooling mode, giving excessive velocities, 7. For rectangular diffusers, throw values tested are on the longer side of the
it may be necessary for coanda plates to be fitted to the diffusers. For the shorter side throws, values are to be multiplied by 0.72.
diffuser. Please check with factory for details.
8. The following tables include the results of tests conducted
4. Another fault that can give rise to ‘dumping’ on cooling cycles is low on samples of air terminals. The test results include Noise
jet velocities at the diffuser core. In order to avoid this, it is advisable to Criteria (NC), static pressure verses air flow, throw and effective
ensure that neck velocities do not drop below 0.75m/s, (150fpm). area. Extrapolation was used to obtain the performance for
other sizes and other parameters within the range of products
5. Models With Reduced Necks. mentioned above.

G-3
 PLAQUE CEILING DIFFUSER

PERFORMANCE DATA - SI UNITS

Symbols Conditions
L/sec : Air Volume in Litres per second. Supply or Return as indicated.
Af : Effective free area in square meters. Noise Criteria values are based on (10dB) room attenuation.
Vf : Face Velocity in meters per second. Damper is fully open.
Ak : Neck Area in square meters. Maximum room height = 4.0m
Vk : Neck Velocity in meters per second. Maximum Cooling @ ∆T = 10K
Pt : Total pressure in Pascal. Correction for 1, 2 and 3 way
Th : Throw in meters. Noise Criteria : No correction required.
NC : Noise Criteria. Pressure : No correction required.
Notes Throw : 3 way - increase for 15%
The large throw values are based on the minimum terminal : 2 way - increase for 25%
velocity of 0.25 m/sec. : 1 way - increase for 45%
The middle throw values are based on the medium terminal Drop : No correction required.
velocity of 0.50 m/sec.
The small throw values are based on the maximum terminal
velocity of 0.75 m/sec.

NOTES

G-4
 PLAQUE CEILING DIFFUSER

PERFORMANCE DATA
Neck
Velocity 2.0 2.5 3.0 3.5 4.0 4.5 5.0 6.0 7.0 8.0
Listed (m/s)
Size Velocity
Pressure 2 4 5 8 10 12 15 22 30 40
(Pa)
Total
2 4 6 8 10 13 16 23 32 41
Pressure (Pa)
150 x 150 L/s 37 46 56 65 74 83 93 111 130 148
NC - - - - - 19 22 29 34 38
Throw (m) 0.4 0.5 1.1 0.4 0.7 1.3 0.5 0.8 1.6 0.6 0.9 1.9 0.7 1.1 2.0 0.8 1.2 2.1 0.9 1.3 2.2 1.1 1.6 2.4 1.2 1.9 2.6 1.4 2.0 2.8
Total
7 11 16 22 29 36 45 64 88 115
Pressure (Pa)
225 x 225 L/s 103 129 154 180 206 232 257 309 360 412
NC - - - 18 22 26 30 36 41 46
Throw (m) 0.8 1.2 2.3 1.0 1.5 2.6 1.2 1.7 2.9 1.4 2.0 3.1 1.5 2.3 3.3 1.7 2.5 3.5 1.9 2.6 3.7 2.3 2.9 4.1 2.5 3.1 4.4 2.7 3.3 4.7
Total
10 16 23 32 41 52 64 93 126 165
Pressure (Pa)
300 x 300 L/s 148 185 222 259 297 334 371 445 519 593
NC - - 15 21 25 29 33 39 44 49
Throw (m) 1.0 1.5 2.8 1.3 1.9 3.2 1.5 2.3 3.5 1.8 2.6 3.7 2.0 2.8 4.0 2.3 3.0 4.2 2.6 3.2 4.5 2.8 3.5 4.9 3.1 3.7 5.3 3.3 4.0 5.7
Total
14 22 31 44 56 70 87 126 172 225
Pressure (Pa)
375 x 375 L/s 202 252 303 353 404 454 505 605 706 807
NC - - 18 23 27 31 35 41 46 51
Throw (m) 1.3 1.9 3.3 1.6 2.4 3.7 1.9 2.9 4.0 2.3 3.1 4.4 2.6 3.3 4.7 2.9 3.5 4.9 3.0 3.7 5.2 3.3 4.0 5.7 3.6 4.4 6.2 3.8 4.7 6.6
Total
16 26 35 50 64 81 100 145 197 258
Pressure (Pa)
450 x 450 L/s 232 290 348 405 463 521 579 695 811 927
NC - - 19 24 28 32 36 42 47 52
Throw (m) 1.4 2.2 3.5 1.8 2.7 4.0 2.2 3.1 4.3 2.5 3.3 4.7 2.9 3.5 5.0 3.1 3.7 5.3 3.2 4.0 5.6 3.5 4.3 6.1 3.8 4.7 6.6 4.1 5.0 7.1

THROW DIAGRAM

Horizontal Radial Pattern - Plan View

G-5
 ROUND
CEILING DIFFUSER

We Care For The Air You Breathe

H

www.flowtechind.com Part of
 ROUND CEILING DIFFUSER

Round Ceiling Diffuser Index

SUPPLY ROUND DIFFUSERS (SRD) & RETURN ROUND DIFFUSER (RRD) H1

PRODUCT FEATURES H1

APPLICATION H1

ACCESSORIES H1

DIMENSIONS H1

INSTALLATION DETAILS H2

ORDERING SYSTEM H2

NOTES H3

PERFORMANCE DATA - RD H3
 ROUND CEILING DIFFUSER

SUPPLY ROUND DIFFUSERS (SRD) & RETURN ROUND DIFFUSER (RRD)

PRODUCT FEATURES APPLICATION
Supply or exhaust round ceiling diffusers with fully adjustable Heating, Cooling or Ventilation requiring wide diffusion
cores to provide horizontal or vertical air pattern. effect. For ceiling or exposed duct installation.
Removable inner cores permit easy installation and access to duct. ACCESSORIES
Sponge gasket added to prevent streaking. Damper (optional) for volume control in round neck diffusers
Construction: Aluminium is available with Butterfly Type Damper

Standard Finish: White powder coated. Other colors are Damper (optional) for volume control in round neck diffusers
available upon request. is available with Rotating Type Damper

Round Diffuser with Butterfly Type Damper Round Diffuser with Rotating Type Damper

DIMENSIONS DIMENSIONS

Size AØ DØ Size AØ DØ
150 250 145 150 250 145
200 300 195 200 300 195
250 350 245 250 350 245
300 400 295 300 400 295
350 450 345 350 450 345
400 500 405 400 500 405
450 550 455 450 550 455
521 653 521 521 653 521
573 704 573 573 704 573
625 756 625 625 756 625

H-1
 ROUND CEILING DIFFUSER

INSTALLATION DETAILS
1. Install outer core of the circular diffuser by means of ceiling
hangers or with the help of self tapping screws. Duct joints are
then sealed with adhesive tape.
2. Center core assembly can be detached or attached by
rotating anti-clockwise or clockwise direction.
3. Horizontal or vertical discharge pattern could be achieved by
rotating the center core clockwise or anti-clockwise direction.

a. Rotate the center core clockwise until you get required

horizontal discharge pattern.

b. Rotate anti-clockwise to get required vertical discharge

pattern.
4. Damper is attached to the outer core collar of the diffuser.
(Factory assembled for supply diffuser only.)
ORDERING SYSTEM

RAL Code Color

Nominal size or Neck diameter (mm)

N :Without Damper
BD :Butterfly Damper
RD :Rotating Damper

SRD : Supply Round Diffuser

RRD : Return Round Diffuser

Ordering Example
SRD - BD - 500mm - 9016
Stands for Round Ceiling Diffuser with adjustable cores, with Butterfly Damper, neck size 500mm Dia, powder coated RAL9016.

H-2
 ROUND CEILING DIFFUSER

NOTES:
1. Throw is based on a 0o temperature differentia Vel = Neck Velocity m/s)
2. The dB(A) values are based on a 10db room attenuation. P = Pressure Drop, mm H2O
3. Performance Data are subject to change without notice for T = Throw,m
further improvement
dB(A) = Noise Level
4. Performance Data of 400 and above are not available now

PERFORMANCE DATA - RD

Model
Sizes 150 200 250 300 350
(m­3/h)

Vel 5.50 2.39 1.55 1.08 0.81

P 2.22 0.57 0.35 0.27 0.23
200 T min 1.00 0.66 0.53 0.44 0.38
T max 1.61 1.15 0.98 0.87 0.79
dB (A) <14 <14 <14 <14 <14
Vel 10.99 4.78 3.10 2.15 1.61
P 8.33 1.73 0.83 0.5 0.36
400 T min 1.99 1.31 1.06 0.88 0.76
T max 43 2.03 1.69 1.45 1.28
dB (A) - 31 20 <14 <14
Vel - 7.17 4.65 3.23 2.42
P - 3.66 1.64 0.89 0.58
600 T min - 1.97 1.59 1.32 1.14
T max - 2.90 2.39 2.04 1.80
dB (A) - 43 33 24 16
Vel - - 6.20 4.31 3.22
P - - 2.11 1.44 0.89
800 T min - - 2.11 1.76 1.52
T max - - 3.10 2.63 2.31
dB (A) - - 40 31 24

H-3
 EXHAUST
DISC VALVE

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www.flowtechind.com Part of
 EXHAUST DISC VALVE

Exhaust Disc Valve Index

EXHAUST DISC VALVES (EDV) I1

PRODUCTS FEATURES I1

STANDARD FINISH I1

FIXING I1

AVAILABLE SIZES I1

SELECTION CHART I1
 EXHAUST DISC VALVE

EXHAUST DISC VALVES (EDV)

PRODUCTS FEATURES
Circular exhaust air valves.
Steel construction.
Center core adjustable by screw and nut for air volume control.
The outer body is fitted with a foam - rubber gasket to form
an airtight seal with the mounting ring.

STANDARD FINISH
White powder coated. Other colors are available upon request.

FIXING
Galvanized steel mounting ring with screw holes.

AVAILABLE SIZES

ØN N D F
100 96 75 138
125 123 100 164
150 148 120 202
200 198 158 248

SELECTION CHART
Circular Air Valves EDV

Nominal Sizes (mm) Air Flow (m­3 / h)

100 125 150 200 20 40 60 80 100 150 200 300
Pa 90
NR -
Pa 45 170
-9
NR - 20
Pa 20 80 200 300
-6 -12
NR - 12 25 28
Pa 10 50 120 200
-3 -20
NR - - 17 26
Pa 30 70 120 200
-6
NR - 12 20 28
Pa 20 40 80 130
6
NR - - 15 22
Pa 15 30 60 80 200
0 15
NR - - 11 18 30
Pa 10 20 40 60 150
12 6
NR - - - 13 27
Pa 15 25 40 90 170
0
NR - - 9 21 30
Pa 15 25 60 100 220
12 6
NR - - 15 25 31
Pa 15 30 60 150
12 0
NR - 10 18 30

I-1
LOUVERS

We Care For The Air You Breathe

www.flowtechind.com Part of
 LOUVERS

Louvers Index
GRAVITY LOUVER (GL) J1

PERFORMANCE CHART J1

EXHAUST AIR LOUVERS (EAL) J2

PERFORMANCE CHART J2

FRESH AIR LOUVERS (FAL) J3

FILTER LOUVERS (FL) J3

PERFORMANCE CHART J3

SAND TRAP LOUVER - WALL MOUNTED (STLW) J4

SAND TRAP LOUVER - FLUSH MOUNTED (STLF) J4

STANDARD FINISHES J4

PERFORMANCE CHART J5

ORDERING SYSTEM J5
 LOUVERS

GRAVITY LOUVER (GL)

The GL is a wall mounted device that is composed of a set of

horizontally mounted blades that are normally closed and are
free to rotate around their horizontal axis.
This louver serves as a non-return damper and can be used
at the exit terminal of exhaust ducts and fans.
A certain pressure is usually required before the damper
opens to expel the exhaust air, which ensures the elimination
of back flow.
The blades are made from light weight aluminium sheets while
the frame is made from extruded aluminium. 30mm frame as a
standard. 20mm and 25mm are available, if required. Wall Mounted Gravity Louvers (GL)

PERFORMANCE CHART
Free area ratio = 0.81 for 100% open blades.
To calculate the pressure drop: Face Velocity = Air Flow / Area of the Louver

J-1
 LOUVERS

EXHAUST AIR LOUVERS (EAL)

Exhaust Air Louver (EAL-45)

The Exhaust Air Louver is a weather proof external cover for EAL-100
air inlets and discharge openings, suitable for most external An EAL (EAL-100) wtih an average
walls and screening applications. free area above 50% is available
The EAL with a free area of 41% is composed of frame and upon request. With 100m depth.
horizontal blade assembly, manufactured from 0.90mm thick
high quality extruded aluminium profiles. Blades are fixed
rigidly to the main frame by rivets and set at an angle of 45°
to the horizontal with 40mm spacing inclined downward to
protect against rain water.
30mm frame as a standard. 20mm and 25mm are available,
if required. Indoor Louver
A heavy duty option (EAL-H) also is available with 1.80mm Another option available is a
thick extruded Aluminium frame and blades. With 40mm Exhaust Air Louver (EAL-45) Louver (IL) specifically designed
frame and 50mm depth Dimension Details for the indoor purpose.

PERFORMANCE CHART
To calculate the pressure drop: - as tested in accordance with AMCA 500-L: Face Velocity = Airflow / Area of the Louver

J-2
 LOUVERS

FRESH AIR LOUVERS (FAL) & FILTER LOUVERS (FL)

The Fresh Air Louver is a simple form of filter louvers. It is

composed of an exhaust louver with an aluminium filter fixed
at the back.
The fresh air louver with a free area of 38% is suitable for
use in air inlets of fresh air ducts and air handling units. It is
also suitable for use at dirty air exhaust discharge.
30mm frame as a standard. 20mm and 25mm are available,
if required Fresh Air Louver (FAL) Filter Louver (FL)
An FAL (FAL-100) wtih an average free area above 50% is Another option available is a Louver (IL) specifically designed
available upon request. With 100m depth. for the indoor purpose.
A heavy duty option (FAL-H) also is available with 1.80 mm Also available as Filter Louver (FL) which is composed of an
thick extruded Aluminium frame and blades. With 40mm exhaust air louver fixed to a frame that contains a filter by
frame and 50mm depth means of stainless steel hinges.
The Filter is made of washable aluminium media and is fixed 30mm frame as a standard. 20mm and 25mm are available,
on the back of grille. Filter is 25mm thick. if requested.

PERFORMANCE CHART
To calculate the pressure drop: - as tested in accordance with AMCA 500-L: Face Velocity = Airflow / Area of the Louver

J-3
 LOUVERS

SAND TRAP LOUVER - WALL MOUNTED (STLW)

The STL is used to lower the dust loading of conventional
filteration as it is designed to separate large size sand
particles at low to medium speeds. It is also fitted with a bird
screen mesh made of galvanized steel to protect against
undesired objects. Insect screen of stainless steel can be
installed as optional.
The STL is a self emptying system, it has a set of holes at
the bottom face of the casing to discharge separated sand
particles.
The STL is made of aluminium sections. It is composed of
two sets of inverted U channels, mounted vertically on two
opposite rows. Aluminium washable filter (optional) can be
installed on the neck of the louver. Filter is 25mm thick.

STANDARD DIMENSIONS
Any combination of A x B.
A 450 600 750 900 1050 1200 1350 1500 1650 1800 1950
B 450 500 600 800 1000 1200

Other size B, available on request by step of 50mm.

SAND TRAP LOUVER - FLUSH MOUNTED (STLF)
Designed to separate sand and dust from the air stream.
Generally used for ventilation applications and at the inlet
duct of air handling unit.
Surface of the louver is fixed flush with the plane of the
wall. Composed of two sets of inverted U-channels mounted
vertically in two opposite rows.
The filtered sand will be drained through a sand chute. Sand
chute is an inclined tray fixed at the bottom of the louver for
the purpose of draining sand.

STANDARD FINISHES
Available on RAL 9010 or 9016.
Other powder coated color finishes
are available on request.

J-4
 LOUVERS

PERFORMANCE CHART
Tested in accordance with BS EN 13181 : 2001 at different core velocities varying from 0.5 to 3.5m/s with grade of sand ranging
from 76-700 micron.
Standard Free area = 33%
Pressure Loss Vs. Free Area Velocity Effectiveness vs Face Velocity

ORDERING SYSTEM

A XB
RAL Code Color

Height in mm

Width in mm

GL : Gravity Louvers
EAL : Exhaust Air Louvers
EAL-H : Exhaust Air Louvers-Heavy Duty
EAL-100 : Exhaust Air Louvers with 100mm depth
FAL : Fresh Air Louvers
FAL-H : Fresh Air Louvers-Heavy Duty
FAL-100 : Fresh Air Louvers with 100mm depth
Ordering Example IL : Indoor Louvers
FL : Filter Louvers
STLW : Sand Trap Louvers Wall Mounted
STL - 1200 x 600 - 9010 STLF : Sand Trap Louvers Flush Mounted
Stands for Sand Trap Louver, 1200mm Width x 600mm Height,
powder coated to RAL 9010.

J-5
JET & DRUM JET
DIFFUSER

We Care For The Air You Breathe

www.flowtechind.com Part of
 JET AND DRUM JET DIFFUSERS

Jet and Drum Jet Diffuser Index

JET DIFFUSER (JD-A) K1

CHARACTERISTICS K1

PRODUCTS FEATURES K1

DIMENSIONS K1

INSTALLATION K1

JET DIFFUSER IN PANEL K1

TECHNICAL PARAMETER K2

RING JET DIFFUSER (JD-C) K4

CHARACTERISTICS K4

STANDARD SIZES K4

PERFORMANCE DATA K4

DRUM JET DIFFUSER (DJD) K5

PRODUCTS FEATURES K5

CHARACTERISTICS K5

OPERATING CONDITIONS OF AIR SUPPLY K5

DIMENSION TABLE K5

TECHNICAL PARAMETER K6
 JET AND DRUM JET DIFFUSERS

JET DIFFUSER (JD-A)

CHARACTERISTICS
Jet Diffusers are suitable for long throw distances, have optimum
acoustics properties and are easy to install and adjust. Since the
direction of the supply air flow is very important, we designed the
revolving type jet diffusers where the direction of diffusers can
be adjusted manually.
Jet nozzle consists of discharge nozzle with spherical outlet
mounted in a housing, a mounting flange and a circular duct
rear connection spigot for direct connection to a circular duct.

PRODUCTS FEATURES INSTALLATION

Jet Diffusers are used in large areas especially when the Flowtech Jet Diffuser are suitable for mounting on rectangular or
distribution of air via ceiling diffusers is not possible. circular ducts. With both types of connection, there is a circular
undrilled flange which can be used for either screwing or rivet
In summer, the supply air is deflected upwards (cold air) and
fixing by others but a sealing strip should preferably be fitted first.
in winter, downwards (warm air) to mix with the existing air
stream uniformly. A spigot is provided for direct connection to spiral or flexible
circular ducts. The spigot diameter accepts standard circular
The well-designed aerodynamic shape of Flowtech Jet Diffusers duct size.
results in low noise characteristics and can be used in areas
Jet diffuser can be inserted into an connection spigot and can
which need high quality air such as concert halls, theater,
be screwed to the air duct. To hide the screws, a covering with a
museum, etc.
bayonet fixing can be fixed, which is easy to knock down later.
Material: Aluminium
Finish: Standard colors are RAL9010 or RAL9016. Other colors
are available upon request.

DIMENSIONS

JET DIFFUSER IN PANEL

Size (mm) Neck Face Height

100 98 139 85
125 123 170 100
150 148 200 110
160 158 200 110
200 198 265 140
250 248 315 175
315 313 385 230
400 398 495 285
450 448 520 305
500 495 620 350
630 625 779 420

K-1
 JET AND DRUM JET DIFFUSERS

TECHNICAL PARAMETER
Effective Area of Air Volume Pressure Noise Length of a Air Stream for Isothermal
Size
Supply (m­2) (m3/h) Loss (Pa) Db (A) Condistions Ln (m)
100 18.5 26 10.7
125 22.8 30 13.5
160 56 34 17.4 0.25
200 82 39 22.2
250 116 43 27.3
160 0.005
125 22.8 30 6.7
160 56 34 8.6
200 82 39 10.8 0.50
250 116 43 13.5
320 144 48 16.3
160 10 30 12.7
200 21 33 16
250 54 38 20 0.25
320 82 41 25.7
400 116 45 32.2
200 0.009
200 21 33 7.9
250 54 38 9.9
320 82 41 12.6 0.50
400 116 45 16
500 142 49 18.5
250 11 29 12.9
320 22 34 16.9
400 55 39 25.2 0.25
500 81 42 31.5
630 116 46 37.5
250 0.145
320 22 34 8.4
400 55 39 12.5
500 81 42 15.6 0.50
630 116 46 18.6
800 142 50 21.4
400 12.8 26 16
500 21 34 20
630 46 38 25 0.25
800 68 42 30.2
1000 94 46 37
315 0.023
500 21 34 9.9
630 46 38 12.5
800 68 42 15 0.50
1000 94 46 18.4
1250 148 50 21.6

K-2
 JET AND DRUM JET DIFFUSERS

TECHNICAL PARAMETER
Effective Area of Air Volume Pressure Noise Length of a Air Stream for Isothermal
Size
Supply (m­2) (m3/h) Loss (Pa) Db (A) Condistions Ln (m)
630 8 32 17.6
800 17 36 22.2
1000 31 39 28.4 0.25
1250 58 43 34
1600 80 46 40
400 0.0415
800 17 36 10.9
1000 31 39 14
1250 58 43 1.8 0.50
1600 80 46 19.7
2000 102 49 22.8
1000 5 30 18.3
1250 12 36 22.8
1600 28.8 41 28.9 0.25
2000 51 44 34.8
2500 70 50 41.2
500 0.0642
1250 12 36 11.3
1600 28.8 41 14.3
2000 51 44 17.2 0.50
2500 70 50 20.4
3200 90 52 23.1
2000 6 36 17.5
2500 12.5 41 21.8
3200 29.4 43 27.6 0.25
4000 52 46 35.4
5000 78 49 44.3
630 0.127
2500 12.5 41 10.8
3200 29.4 43 14
4000 52 46 18.2 0.50
5000 78 49 21.6
6300 103 51 26

K-3
 JET AND DRUM JET DIFFUSERS

RING JET DIFFUSER (JD-C)

STANDARD SIZES

CHARACTERISTICS: Model B (mm) A (mm)

• 360 - 4 way adjustable
o
Aluminium JD-C150 148 210
JD-C200 198 260
• Metal slide damper as optional • RAL 9016/9010 white as standard JD-C250 248 310
JD-C300 298 360
JD-C350 348 410
JD-C400 398 460

PERFORMANCE DATA
Neck Velocity
300 400 500 600 700 800 1000 1200 1400
(fpm)
Size Velocity
0.006 0.01 0.016 0.022 0.031 0.04 0.062 0.09 0.122
Pressure (w.g)
Deflection 0 22.5 0 22.5 0 22.5 0 22.5 0 22.5 0 22.5 0 22.5 0 22.5 0 22.5
Neck C.F.M 110 140 180 210 250 280 350 420 490
Area SP (w.g) - - 0.010 0.020 0.020 0.030 0.024 0.040 0.040 0.060 0.055 0.100 0.090 0.120 0.150 0.210 0.220 0.300
8” NC - - 18 - 18 15 18 20 21 22 26 25 32 27 33 35 40
0.349
sq. ft Throw (ft) 14 12 18 17 20 18 22 20 24 21 26 23 28 25 30 27 32 28
Neck C.F.M 170 220 280 330 390 440 550 660 770
Area SP (w.g) - - - 0.020 0.010 0.030 0.018 0.040 0.030 0.050 0.040 0.062 0.054 0.091 0.076 0.130 0.100 0.240
10” NC - - - - - 15 - 20 20 22 15 16 24 18 25 32 34 38
0.545
sq. ft Throw (ft) 21 18 24 20 26 21 28 24 30 27 32 28 34 31 38 33 40 35
Neck C.F.M 240 320 400 480 550 630 790 950 1100
Area SP (w.g) - - - 0.010 - 0.025 0.035 0.040 0.040 0.050 0.050 0.100 0.050 0.090 0.060 0.100 0.100 0.200
12” NC - - - - - - - - - 20 18 22 22 32 31 38 35 42
0.785
sq. ft Throw (ft) 25 21 27 23 28 26 31 28 34 31 35 32 41 38 42 40 43 41
Neck C.F.M 330 430 540 650 750 860 1070 1290 1500
Area SP (w.g) - - - - - 0.026 0.030 0.041 0.028 0.040 0.030 0.050 0.040 0.060 0.050 0.100 0.150 0.250
14” NC - - - - - - - 15 15 21 16 29 24 30 29 34 36 40
1.069
sq. ft Throw (ft) 27 23 30 26 33 31 37 33 40 36 41 39 43 41 52 46 59 50
Neck
C.F.M 420 560 700 840 980 1120 1400 1680 1960
SP (w.g) - - - - - 0.030 0.022 0.038 0.033 0.022 0.040 0.030 0.050 0.041 0.060 0.070 0.070 0.085
Area
16” NC - - - - - - - - - 15 - 17 23 26 30 33 35 38
1.396
sq. ft Throw (ft) 30 27 34 32 38 36 41 39 43 41 46 43 54 48 62 54 70 60
Neck C.F.M 540 720 900 1075 1255 1435 1795 2150 2500
Area SP (w.g) - - - - - 0.030 0.020 0.030 0.030 0.040 0.040 0.050 0.060 0.07 0.100 0.110 0.12 0.140
18” NC - - - - - - - 15 - 15 17 25 26 32 30 35 36 40
1.767
sq. ft Throw (ft) 35 32 40 37 42 40 47 44 50 47 55 50 63 56 71 67 80 72

K-4
 JET AND DRUM JET DIFFUSERS

DRUM JET DIFFUSER (DJD)

PRODUCTS FEATURES
Drum Jet Diffusers are used in large indoor areas like airport
lounges, factories, theaters, gymnasiums, museums, meeting
rooms, etc. They are arranged on the side walls. They are
designed for handling large air volumes and long throws.
In summer, the supply air is deflected upwards (cold air) and
in winter, downwards (warm air) to mix with the existing air
stream uniformly.
The adjustable blade in the drum body facilitates in rotating the
OPERATING CONDITIONS OF AIR SUPPLY
drum based on our requirement.
Summer Working Condition
Drum Jet Diffusers can also be supplied with opposed blades
damper (OBD) to facilitate the precise air volume control.

CHARACTERISTICS
To be used for long distance hot /cold air supply. The air
supply angle can be adjusted as per the requirement.
The air-guiding blades can make uniform airflow distribution
in all directions.
The exterior frame and blades are made from aluminium.
Various colors are available to suit customer’s requirements.
Level Supply Air
There is a sealant in between the frame and drum to prevent
the supply air from leaking and also to make the drum locked
in any angle.

DIMENSION TABLE

winter Working Condition

Size W H G D F C
250 X 150 250 150 75 90 40 30
300 X 150 300 150 75 90 40 30
475 X 150 475 150 75 90 40 30
625 X 150 625 150 75 90 40 30
642 X 170 612 170 80 90 40 30
500 X 250 500 250 125 150 60 50
650 X 250 650 250 125 150 60 50
750 X 250 750 250 125 150 60 50
900 X 250 900 250 125 150 60 50

K-5
 JET AND DRUM JET DIFFUSERS

TECHNICAL PARAMETER
Air Terminal
Air
Size Volume Velocity 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 1 1.2 1.3 1.5 1.6 2 2.5
(m³/h) (m/s)
500 32.7 16.2 10.8 8 6.4 5.3 4.5 3.9 3.1 2.5 - - 2 - -
630 > 40 20.3 13.5 10.1 8 6.6 5.7 4.9 3.9 3.2 - - 2.5 - -
800 > 40 26.1 17.3 13 10.3 8.6 7.3 6.4 5.1 4.2 - - 3 - -
Throw (m)
250 x 150

900 > 40 29.4 19.5 14.6 11.7 9.7 8.2 7.2 5.7 4.7 - - 3.7 - -
1000 > 40 32.6 21.7 16.2 13 10.7 9.2 8 6.3 5.3 - - 4.2 - -
1250 > 40 > 40 27.2 20 16.1 13.5 11.5 10.1 8 6.6 - - 5.3 - -
1600 > 40 > 40 34.8 26.1 20.4 17.3 14.8 12.9 10.3 8.6 - - 6.8 - -
630 38.4 19.1 12.6 9.47 7.7 6.25 5.33 4.6 3.6 3.04 - - 2.4 - -
700 > 40 21 14 10.5 8.4 6.9 8.9 5.1 4.1 3.4 - - 2.6 - -
800 > 40 24.3 16.1 12 9.4 8 6.8 5.9 4.7 3.9 - - 3 - -
Throw (m)
300 x 150

900 > 40 27.3 18.2 13.6 9.9 9 7.7 6.7 5.3 4.4 - - 3.5 - -
1000 > 40 30.4 20.2 15.1 11.8 10 8.5 7.4 5.9 4.9 - - 3.9 - -
1250 > 40 39 26 19.4 14.8 12.9 11 9.6 7.6 6.3 - - 5 - -
1600 > 40 > 40 33.3 24.9 19.4 16.5 14.1 12.3 9.8 8.2 - - 6.5 - -
800 33.1 16.4 10.9 8.1 6.4 5.3 4.5 3.9 3.1 2.6 - - 2 - -
900 37.3 18.5 12.3 9.1 7.3 6 5.1 4.5 3.5 2.9 - - 2.3 - -
1000 > 40 20.6 13.7 10.2 8.1 0.7 5.7 5 3.9 3.2 - - 2.6 - -
Throw (m)
475 x 150

1250 > 40 25.8 17.1 12.8 10.3 8.4 7.2 6.3 5 4.1 - - 3.3 - -
1600 > 40 33.1 22 16.4 13.1 10.9 9.3 8.1 6.4 5.3 - - 4.2 - -
2000 > 40 > 40 27.4 20.5 16.4 13.6 11.6 10.1 8 6.7 - - 5.3 - -
2500 > 40 > 40 34.4 25.7 20.6 17.1 14.6 12.8 10.2 8.4 - - 6.7 - -
900 28 14.8 9.8 7.3 5.8 4.8 4.1 3.5 2.8 2.1 - - 1.7 - -
1000 33.3 16.5 10.9 8.1 6.5 5.4 4.6 4 3.1 2.6 - - 2 - -
1250 > 40 20.7 13.7 10.2 8.1 6.7 5.8 5 4 3.3 - - 2.6 - -
Throw (m)
625 x 150

1600 > 40 26.6 17.6 13.2 10.3 8.7 7.4 6.5 5.1 4.2 - - 3.3 - -
2000 > 40 33.3 22.1 16.5 12.9 10.9 9.3 8..1 6.5 5.4 - - 4.2 - -
2500 > 40 > 40 27.7 20.7 16.2 13.7 11.7 10.2 8.1 6.7 - - 5.3 - -
3000 > 40 > 40 33.3 24.9 20 16.5 14.1 12.3 9.8 8.1 - - 6.5 - -
1600 > 40 21.5 14.3 10.6 8.4 7 6 5.2 4.1 - 3.4 2.6 - 1.9 1.5
2000 > 40 26.9 17.9 13.3 10.6 8.8 7.5 6.6 5.2 - 4.3 3.4 - 2.5 1.9
500 X 250

Throw (m)

2500 > 40 33 22.4 16.7 13.3 11 9.5 8.2 6.5 - 5.4 4.3 - 3.1 2.5
3000 > 40 40 16.9 20.1 15.9 13.3 11.4 9.9 7.9 - 6.5 5.2 - 3.8 3
3500 > 40 > 40 31.5 23.6 18.7 15.6 13.4 11.7 9.3 - 7.7 6.1 - 4.1 3.6
4000 > 40 > 40 35.9 26.9 21.4 17.8 16.2 13.3 10.6 - 8.8 7 - 6.2 4.1
2000 38.2 19 12.6 9.4 7.5 6.2 5.2 4.6 3.6 - 3 2.3 - 1.72 1.3
2500 > 40 23.9 15.8 11.8 9.3 7.8 6.7 5.8 4.6 - 3.8 3 - 2.2 1.7
3000 > 40 28.7 19.1 14.2 11.3 9.4 8 7 5.6 - 4.6 3.6 - 2.7 2.1
650 X 250

Throw (m)

3500 > 40 33.5 22.3 16.7 13.2 11 9.4 8.2 6.5 - 5.4 4.3 - 3.1 2.5
4000 > 40 38.4 25.5 19.1 15.1 12.6 10.8 9.4 7.5 - 6.2 3.9 - 3.6 2.8
4500 > 40 > 40 28.7 21.5 17.1 14.2 12.2 10.6 8.4 - 7 5.6 - 4.1 3.2
5000 > 40 > 40 31.9 23.9 19 15.8 13.5 11.8 9.4 - 7.8 6.2 - 4.6 3.6
2500 > 40 24.3 16.1 12 9.5 7.9 6.7 5.9 4.6 - 3.8 3 - 2.2 1.7
3000 > 40 29.2 19.4 14.5 11.5 9.5 8.1 7.1 5.6 - 4.6 3.7 - 2.7 2.1
3500 > 40 34 22.6 16.9 13.5 11.2 9.6 8.3 6.6 - 5.5 4.3 - 3.2 2.5
750 X 250

Throw (m)

4000 > 40 38.7 25.7 19.2 15.3 12.7 10.9 9.5 7.5 - 6.2 3.9 - 3.6 2.8
4500 > 40 > 40 29.2 21.8 17.4 14.5 12.4 10.8 8.6 - 7.1 6.6 - 4.1 3.3
5000 > 40 > 40 32.9 24.3 19.2 16.1 13.8 12 9.5 - 7.9 6.3 - 4.6 3.7
6000 > 40 > 40 > 40 29.2 23.2 19.3 16.5 14.4 11.5 - 9.5 7.6 - 5.6 4.4
3000 > 40 24.8 16.5 12.3 9.8 8.1 6.9 6 4.8 - 3.9 3.1 - 2.2 1.7
3500 > 40 29 19.2 14.4 11.5 9.5 8.1 7 5.6 - 4.6 3.6 - 2.7 2.1
4000 > 40 37.1 24.6 19.4 14.7 12.2 10.4 9.1 7.2 - 6 4.7 - 3.5 2.75
900 X 250

Throw (m)

5000 > 40 > 40 27.6 20.6 16.5 13.7 11.7 10.2 8.1 - 6.7 5.3 - 3.9 3.1
5500 > 40 > 40 30.4 22.7 18.1 15.1 12.9 11.2 8.9 - 7.4 5.9 - 4.3 3.4
6000 > 40 > 40 33 24.8 19.8 16.5 14.1 12.3 9.8 - 8.1 6.4 - 4.8 3.7
7000 > 40 > 40 38.6 28.8 23.8 19.1 16.4 14.3 11.4 - 9.4 7.5 - 5.6 4.4

K-6
 JET AND DRUM JET DIFFUSERS

TECHNICAL PARAMETER
Air Volume (m3/h) Specification

250 x 150 300 X 150 475 X 150 625 X 150 500 X 250 650 X 250 750 X 250 900 X 250

Pressure Noise Pressure Noise Pressure Noise Pressure Noise Pressure Noise Pressure Noise Pressure Noise Pressure Noise
Loss dB Loss dB Loss dB Loss dB Loss dB Loss dB Loss dB Loss dB
(Pa) (A) (Pa) (A) (Pa) (A) (Pa) (A) (Pa) (A) (Pa) (A) (Pa) (A) (Pa) (A)

25.1 32 - - - - - - - - - - - - - -
500

39.1 34 30.8 33.5 - - - - - - - - - - - -

630

64.3 40 67 38 20 34 - - - - - - - - - -
800

81.3 42 85 40 25 35 <10 26 - - - - - - - -
900
1000

100 44 102 42 31.8 36 <20 30.3 - - - - - - - -

1250

156 47.5 142 46.5 70 40.5 30 37 - - - - - - - -

1600

256 51 180 50 108 45 61 41 26 37.5 - - - - - -

2000

- - - - 142 49 95 45 50 41 20 38 - - - -
2500

- - - - 180 53 130 49 74 44.5 38 41 20 29 <10 <32

- - - - - - 160 52 100 47.5 66 43 40 42.5 25 40

300
3500

- - - - - - - - 126 49.5 93 48 70 46.5 40 42.5

4000

- - - - - - - - 142 53 123 52 102 50 68 47

4500

- - - - - - - - - - 138 54 118 52 81 49
5000

- - - - - - - - - - 152 55.5 133 54 96 51

6000

- - - - - - - - - - - - 162 57.5 124 54.2

7000

- - - - - - - - - - - - - - 154 60

K-7
 SWIRL
DIFFUSER

We Care For The Air You Breathe

www.flowtechind.com Part of
 SWIRL DIFFUSER

Swirl Diffuser Index

SQUARE SWIRL DIFFUSER (SSD) L1

PRODUCTS FEATURES L1

ACCESSORIES L1

MATERIALS L1

INSTALLATION L1

TYPES L2

PARAMETERS L2

CHART L3

ROUND SWIRL DIFFUSER (RSD) L4

PRODUCTS FEATURES L4

STANDARD SIZES L4

BLADE ADJUSTMENT L4

THROW L4

PERFORMANCE CHARACTERISTICS L5
 SWIRL DIFFUSER

SQUARE SWIRL DIFFUSER (SSD)

SSD (Square Swirl Diffuser) are manually adjustable. It adjusts
the direction of the air current to adapt to any change in the
pattern of the building.
Air is blown by means of swirl, which guarantees high inductivity
as well as the rapid reduction in wind speed and temperature.
The air supply temperature difference can reach ± 20°C.
SSD type diffuser could be used for air blow and draught. The
specified diversion blades are to be used when the diffuser
is used for air blow. Change of air blow direction could be
achieved by means of altering the blade settings.

PRODUCTS FEATURES MATERIALS

To supply helical air with high inductivity rate. With Aluminium - Powder coated. The diversion blades are
made of polystyrene and painted in white or black
Rapid reduction in temperature.
Round and square diffuser panel as option. INSTALLATION
Manually adjustable. Installation flat to the ceiling is applicable to all types. If
the density of diversion ring is less than 50mm, and even if
ACCESSORIES the diffuser is installed and sealed beneath the suspended
ceiling, a stable blowing current can be guaranteed.
For specification 300 x 8, 400 x 16, 500 x 54, 600 x 24, 625 x 24,
the diversion blades are set to operate by turning outward.
For specification 600 x 48 and 825 x 72, the external diversion
blades are set to operate by turning outward and the internal
ones are set to operate by turning inward.

L-1
 SWIRL DIFFUSER

TYPES
SIZE 600X24
SIZE 300X8 SIZE 400X16 SIZE 500X24 SIZE 600X48 SIZE 825X72
SIZE 625X24

SSD - 1 SSD - 2 SSD - 3 SSD - 4 SSD - 5 SSD - 6

PARAMETERS
AIR BLOW VERTICAL AIR BLOW HORIZONTAL
Breastplate Breastplate
Specs 0O 45O 90O Specs 0O 45O 90O
Angle Angle
∆ Pt X 1.0 X 1.2 X 1.8 ∆ Pt X 1.0 X 1.3 X 2.2
300 X 8 300 X 8
L­WA - - - L­WA - +3 +5

∆ Pt X 1.0 X 1.1 X 2.0 ∆ Pt X 1.0 X 1.2 X 2.3

400 X 16 400 X 16
L­WA - - +1 L­WA - +1 +3

∆ Pt X 1.0 X 1.4 X 2.8 ∆ Pt X 1.0 X 1.5 X 3.4

500 X 24 500 X 24
L­WA - +3 +6 L­WA - +2 +3

600 X 24 ∆ Pt X 1.0 X 1.3 X 2.8 600 X 24 ∆ Pt X 1.0 X 1.5 X 4.0

625 X 24 L­WA - +3 +5 625 X 24 L­WA - +2 +5

∆ Pt X 1.0 X 1.6 X 3.4 ∆ Pt X 1.0 X 1.7 X 4.5

600 X 48 600 X 48
L­WA - +4 +9 L­WA - +5 + 10

∆ Pt X 1.0 X 1.3 X 3.3 ∆ Pt X 1.0 X 1.5 X 4.7

825 X 72 825 X 72
L­
WA
- +2 +4 L­
WA
- +5 + 11

Max Air Min. Air Effective

Max Noise Min. Noise
Size Volume Volume Air Blowing
dB (A) dB (A)
(m³/h) (m³/h) Area (m²)
300 x 8 252 54 40 <20 0.0070
400 x 16 396 108 40 <20 0.0140
500 x 24 468 144 40 <20 0.0210
600 x 24 684 216 40 <20 0.0295
600 x 48 828 360 40 <20 0.0390
625 x 24 684 216 40 <20 0.0295
825 x 72 1260 558 40 <20 0.0730

L-2
 SWIRL DIFFUSER

CHART
AIR BLOW VERTICAL AIR BLOW HORIZONTAL
Air Volume Pressure Loss Air Volume Pressure Loss
Specs Noise (dB) Specs Noise (dB)
(m³/h) (Pa) (m³/h) (Pa)
72 5.5 <20 108 10 <20
90 9 <20 144 18 22.5
108 15 20 180 28 28
300 X 8
300 X 8 144 25 27.5 252 55 38
180 35 38 288 65 42.5
252 70 47.5 360 120 50
288 100 50 180 9 <20
162 4 <20 252 18 26
180 8 <20 288 23 30
400 X 16
216 13 23 360 35 37.5
400 X 16
288 25 25 450 50 42
360 36 37 540 70 50
540 80 55 252 10 15
252 10 22 360 20 33
360 20 33 450 28 37
500 X 24
500 X 24 576 45 45 540 45 43
720 70 50 630 60 47
1080 170 70 720 70 70
360 9.5 21 288 6 <20
450 14 26 360 8 22
600 X 24 540 20 33 450 13 27
600 X 24
625 X 24 720 33 42 540 19 34
625 X 24
900 55 47.5 720 30 41
1080 80 55 900 40 45
360 6.5 <20 1080 65 53
450 9 20 360 6 13
540 13 25 450 10 22.5
600 X 48
720 25 35 540 15 27
600 X 48
900 50 46 720 26 36
1080 90 50 900 33 40
630 7.5 20 1080 60 46
720 10 28 540 7 <20
900 15 31 720 10 23
825 X 72 1080 20 36 900 13 26
825 X 72
1440 40 45 1080 20 34
1800 60 53 1440 32 43
- - - 1800 60 47

L-3
 SWIRL DIFFUSER

ROUND SWIRL DIFFUSER (RSD)

PRODUCTS FEATURES
The blade can be adjusted to suit summer, winter or normal
temperature conditions.
Aluminium construction
Manually adjustable blade profiles
Environment friendly swirl motion
Designed for large areas like Airports, Exhibition Centres e.t.c.
where long throw is required. Powder coated to required RAL
finish

STANDARD SIZES
Model Size (mm) D (mm) H (mm) D1 (mm) E (mm)
RSD200 200 Ø 200 195 320 22.5
RSD250 250 Ø 250 170 360 22.5
RSD315 315 Ø 315 210 460 20
RSD350 350 Ø 350 220 500 20
RSD400 400 Ø 400 235 570 25
RSD500 500 Ø 500 260 720 32.5
RSD630 630 Ø 630 310 875 30

BLADE ADJUSTMENT
Summer Normal Winter

THROW (m)
Air Volume
Item 400 500 600 800 1000 1200 1600 2000 2500 3000 3500 5000 6000 7000 8000 9000 10000
(m­3/h)
Summer 315 Ø 1.26 1.56 1.91 2.56 3.13 3.9 4.9
400 Ø 0.85 1.07 1.28 1.72 2.17 2.58 3.51 4.3 5.37
Working 500 Ø 1.37 1.54 1.76 2.25 2.64 3.78 4.3 4.95
Condition 630 Ø 1.1 1.31 1.6 2 2.74 3.8 5.5
Fresh Air 315 Ø 3.5 4.3 5.2 7.06 8.8 10.37 13.34
400 Ø 2.5 3.2 3.9 5.2 6.5 7.9 9.8 13.1 16.5
Working 500 Ø 3.4 4.6 6.4 7.8 9.7
Condition 630 Ø 3.6 4.7 5.7 8 10 12 16.5 20.1
Winter 315 Ø
400 Ø
Working 500 Ø 4 5.4 7.6 9.2 11.5 16.1 18.3 22
Condition 630 Ø 4 5.58 6.75 9.4 11.8 14.2 19 23.7

L-4
 SWIRL DIFFUSER

PERFORMANCE CHARACTERISTICS
Parameters
RSD MODEL Air Volume (m­ /h)
3

Pressure Drop (Pd) Noise dB (A)

200 3.9 12
300 8.6 21
400 15 28
500 24 31
600 34.5 34
315 mm Ø
700 47 38
800 62 43
1000 95 48
1200 150 53
1600 248 56
400 5.8 16
500 9 24
600 13 29
700 17.7 32
800 23 35
400 mm Ø
1000 36 40
1200 52 43
1600 92 48
2000 144 52
2500 225 55
800 9 18
900 11.4 22
1000 13.85 28
1250 21.7 33
1600 35.6 37
500 mm Ø
2000 55.8 40
2500 87.2 44
3000 126 48
3200 142 52
3500 171 56
1200 8.5 26
1400 11.5 31
1600 15 36
2000 23 39
2500 37 43
630 mm Ø
3000 53 46
3500 72 49
4000 94 52
4500 119 56
5000 147 60

L-5
 FLOWBAR
SLOT DIFFUSER

We Care For The Air You Breathe

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 FLOWBAR SLOT DIFFUSER

Flowbar Slot Diffuser Index

FLOWBAR SLOT DIFFUSERS (FTFB-F) M1

DIMENSION AND DETAILS (1 SLOT) M1

DIMENSION AND DETAILS (2 SLOT) M1

FLOWBAR SLOT DIFFUSERS - HIDDEN FRAME (FTFB-HF - 45o) M2

DIMENSION AND DETAILS (1 SLOT) M2

DIMENSION AND DETAILS (2 SLOT) M2

FLOWBAR SLOT DIFFUSERS - PLASTER HIDDEN FRAME (FTFB-PHF-45O) M3

DIMENSION AND DETAILS (1 SLOT) M3

DIMENSION AND DETAILS (2 SLOT) M3

FLOWBAR SLOT DIFFUSERS - HIDDEN FRAME (FTFB-HF-90O) M4

DIMENSION AND DETAILS (1 SLOT) M4

DIMENSION AND DETAILS (2 SLOT) M4

GENERAL NOTES M5

PERFORMANCE DATA M5
 FLOWBAR SLOT DIFFUSER

FLOWBAR SLOT DIFFUSERS (FTFB-F)

VERTICAL THROW MODEL (FTFB-F)
Flowbar Slot Diffuser designed for high air flow quantities,
suitable for ceiling applications.
Air pattern can be controlled using pattern controllers, powder
coated black, if required.
Curve is available upon request for 1 Slot Flowbar Diffuser
Flowbar 3 Slot Diffuser is available upon request

DIMENSION AND DETAILS (1 SLOT)

FL S N F H
1 Slot (20 mm) 41 20 65 102 42
1 Slot (25 mm) 41 25 70 107 42
1 Slot (38 mm) 48 38 95 134 42
1 Slot (51 mm) 54 51 121 159 42

AIR MOVEMENT
Horizontal Left Vertical Horizontal Right

DIMENSION AND DETAILS (2 SLOT)

FL S C N F H
2 Slot (23 mm) 41 23 41 132 170 42
2 Slot (42 mm) 48 42 41 182 220 42
2 Slot (62mm) 54 62 41 235 273 42

AIR MOVEMENT
Horizontal Left Vertical Horizontal Right

M-1
 FLOWBAR SLOT DIFFUSER

FLOWBAR SLOT DIFFUSERS - HIDDEN FRAME (FTFB-HF - 45o)

VERTICAL THROW MODEL (FTFB-HF)
Flowbar Slot Diffuser designed for high air flow quantities,
suitable for ceiling applications.
Air pattern can be controlled using pattern controllers, powder
coated black, if required.

DIMENSION AND DETAILS (1 SLOT)

FL S N F H
1 Slot (20 mm) 41 20 65 102 42
1 Slot (25 mm) 41 25 70 107 42
1 Slot (38 mm) 48 38 95 134 42
1 Slot (51 mm) 54 51 121 159 42

AIR MOVEMENT
Horizontal Left Vertical Horizontal Right

DIMENSION AND DETAILS (2 SLOT)

FL S C N F H
2 Slot (23 mm) 41 23 41 132 170 42
2 Slot (42 mm) 48 42 41 182 220 42
2 Slot (62mm) 54 62 41 235 273 42

AIR MOVEMENT
Horizontal Left Vertical Horizontal Right

M-2
 FLOWBAR SLOT DIFFUSER

FLOWBAR SLOT DIFFUSERS - PLASTER HIDDEN FRAME (FTFB-PHF-45O)

HORIZONTAL THROW MODEL (FTFB-PHF)
Flowbar Slot Diffuser Plaster Hidden Frame is designed for
high air flow quantities.
Air pattern can be controlled using pattern controllers, powder
coated black, if required.
Plaster Hidden Frame design

DIMENSION AND DETAILS (1 SLOT)

FL S N F H

1 Slot (20 mm) 41 20 65 102 42

1 Slot (25 mm) 41 25 70 107 42

1 Slot (38 mm) 48 38 95 134 42

1 Slot (51 mm) 54 51 121 159 42

DIMENSION AND DETAILS (2 SLOT)

FL S C N F H

2 Slot (23 mm) 41 23 41 132 170 42

2 Slot (42 mm) 48 42 41 182 220 42

2 Slot (62mm) 54 62 41 235 273 42

M-3
 FLOWBAR SLOT DIFFUSER

FLOWBAR SLOT DIFFUSERS - HIDDEN FRAME (FTFB-HF-90O)

VERTICAL THROW MODEL (FTFB-HF)
Flowbar Slot Diffuser designed for high air flow quantities,
suitable for ceiling applications.
Air pattern can be controlled using pattern controllers, powder
coated black, if required.
Curve is available upon request for 1 Slot Flowbar Diffuser
Flowbar 3 Slot Diffuser is available upon request

DIMENSION AND DETAILS (1 SLOT)

FL S N F H
1 Slot (20 mm) 41 20 65 102 42
1 Slot (25 mm) 41 25 70 107 42
1 Slot (38 mm) 48 38 95 134 42
1 Slot (51 mm) 54 51 121 159 42

AIR MOVEMENT
Horizontal Left Vertical Horizontal Right

DIMENSION AND DETAILS (2 SLOT)

FL S C N F H
2 Slot (23 mm) 41 23 41 132 170 42
2 Slot (42 mm) 48 42 41 182 220 42
2 Slot (62mm) 54 62 41 235 273 42

AIR MOVEMENT
Horizontal Left Vertical Horizontal Right

M-4
 FLOWBAR SLOT DIFFUSER

GENERAL NOTES
1. All pressures are given in Pascal (Pa). 7. For a 600mm section, the throw values are 0.72 times those
2. Pressure loss data assumes a duct velocity less than 4m/sec shown. For a 3000m continuous length, the throw values are
in the inlet duct 1.7 times those shown, 1.8 for 3600mm units.
3. The test were conducted with no Plenum effect for 8. Throws listed are for the 1-way air pattern. For divided airflow,
pressure or sound. select the airflow in each direction according to the number of
slots aimed in that direction, with the total airflow apportioned
4. Isothermal throw values are given for terminal velocities of between slots.
0.3, 0.5, and 0.8 m/sec. 9. Each NC value represents the noise criteria curve which
5. Throw values for High Throw units are based on a 1-way will not be exceeded by the sound pressure in any of the
discharge from the slot. octave bands, 2nd through 7th, with a room absorption of
6. Throw data are based on active sections 1200mm active 10dB, re 1012 Watts, for a 1200mm section, (See Table A for
section. other lengths). For supply units used as a return, add 3 NC.

PERFORMANCE DATA ( FTFB-F / FTFB-HF 45O / FTFB-HF 90O)

1 SLOT
Air Flow (l/s-m) 28 49 65 83 103 119 137
Static Pressure, Pa 4 17 28 46 70 92 122
20 mm Slot Width
NC (Noise Criteria) <15 17 23 32 41 46 50
Throw (m) 1.2—2. 4—4.7 2.8—4.1—6.0 3.7—5.0—7.0 4.7—5.5—7.9 5.2—6.4—8.9 5.4—6.8—9.8 6.0—7.1—10.3
Air Flow (l/s-m) 36 58 79 101 122 144 165
Static Pressure, Pa 7 18 34 55 81 112 148
25 mm Slot Width
NC (Noise Criteria) <10 16 26 33 39 44 49
Throw (m) 1.5—2.5—4.3 2.8—4— 5.5 3.8—4.5—6.5 4.3—5.3—7.3 4.5—5.8—8.3 5.3—6—8.8 5.5—6.8—9.5
Air Flow (l/s-m) 43 65 86 108 129 151 173
Static Pressure, Pa 8 18 32 51 73 99 129
38 mm Slot Width
NC (Noise Criteria) <10 14 24 31 37 42 48
Throw (m) 1.8—3—5 3—4.3—5.8 4—5—6.8 4.3—5.5—7.5 5—5.8—8.3 5.3—6.5—8.8 5.5—6.8—9.8
Air Flow (l/s-m) 43 72 101 129 158 187 216
Static Pressure, Pa 5 14 28 46 68 95 127
51 mm Slot Width
NC (Noise Criteria) <10 11 22 30 36 41 46
Throw (m) 1.5—2.8—5 2.8—4.3—6 4—5.3—7.3 5—5.8—8.3 5.3—6.5—9.3 5.8—7—10 6—7.5—10.8

2 SLOT
Air Flow (l/s-m) 36 58 79 101 122 144 165
Static Pressure, Pa 4 9 20 30 42 51 62
23 mm Slot Width
NC (Noise Criteria) <10 <15 <15 25 30 33 38
Throw (m) 1.0 —1.2 —2.1 1.4 —2 —2.8 1.9 —2.3 —3.3 2.2 —2.7 —3.6 2.3 —2.9 —4.2 2.7 —3 —4.4 2.8 —3.4 —4.8
Air Flow (l/s-m) 43 65 86 108 129 151 173
Static Pressure, Pa 4 9 19 23 35 40 52
42 mm Slot Width
NC (Noise Criteria) <10 <15 <15 20 30 32 35
Throw (m) 1 —1.5 —2.5 1.5 —2.2 —2.9 2 —2.5 —3.4 2.2 —2.8 —3.7 2.5 —2.9 —4.2 2.7 —3.3 —4.4 2.8 —3.4 —4.9
Air Flow (l/s-m) 43 72 101 129 158 187 216
Static Pressure, Pa 3 7 14 21 31 38 51
62 mm Slot Width
NC (Noise Criteria) <10 <15 <15 18 20 30 35
Throw (m) 1.0 —1.4 —2.5 1.4 —2.2 —3 2 —2.6 —3.4 2.5 —2.9 —4.2 2.7 —3.2 —4.7 2.9 —3.5 —5 3 —3.8 —5.4

TABLE A. NC Correction with Length TABLE B. Throw Correction with Length

Length (mm) 600 1200 1800 2400 3000 Length (mm) 600 1200 2400 3000 3600
Supply -3 0 +2 +3 +5 Throw
0.72 1 1.5 1.7 1.8
Return 0 +3 +5 +6 +8 Correction

M-5
 LAMINAR
FLOW DIFFUSER

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 LAMINAR FLOW DIFFUSER

Laminar Flow Diffuser Index

LAMINAR FLOW DIFFUSER (LFD) N1

INSTALLATION N1

CONSTRUCTION N1

DIMENSION AND DETAILS N1

PERFORMANCE DATA N1
 LAMINAR FLOW DIFFUSER

LAMINAR FLOW DIFFUSER (LFD)

Designed to be used in clean space environments such as
medical facilities, research industries and hospital operation rooms.
With a capability to provide uniform velocity air and tempera-
ture to the occupied zone.

INSTALLATION
By insertion in an exposed T-bar grid ceiling. But support rods or
wires can be used for multi-panel assemblies which are
normally supported by adjustable rods from ceiling slab and
with alignment strips that can be used to align the sections.

CONSTRUCTION
With removable perforated face with a safety chain (optional)
for easy cleaning.
Plenum from Aluminium (standard), galvanized steel or stainless
steel sheet. DIMENSION AND DETAILS
Standard finish RAL 9010
Stainless Steel / Galvanized Steel Perforated Face.
Inlet Damper constructed of Extruded Aluminium (optional).
Hepa Filter H13 or H14 grade

PERFORMANCE DATA

Unit Size (in x in) Velocity (Cfm / ft2) 20 30 40 50 60 70

Air Flow(Cfm) 80 120 160 200 240 280
24 x 24 Static Pressure
0.009 0.021 0.038 0.059 0.084 0.115
Neck Size (inch of water)
8” dia. Noise Criteria(NC) <15 <15 <15 18 25 28
Average Velocity (Fpm) 44 65 69 86 92 101
Air Flow(Cfm) 120 180 240 300 360 420
36 x 24 Static Pressure
0.01 0.024 0.042 0.065 0.094 0.128
Neck Size (inch of water)
10” dia. Noise Criteria(NC) <15 <15 <15 17 22 26
Average Velocity (Fpm) 41 48 72 72 82 94
Air Flow(Cfm) 160 240 320 400 480 560
48 x 24 Static Pressure
0.017 0.038 0.068 0.106 0.153 0.208
Neck Size (inch of water)
10” dia. Noise Criteria(NC) <15 <15 19 25 30 35
Average Velocity (Fpm) 42 52 64 71 81 89

Notes
Velocity: Airflow rate through diffuser per square foot of overall face area.
NC: Based on a 10db room attenuation.
Average Velocity: At 6 feet below ceiling.
The above data shown is for a temperature difference of 5oF between the supply air temperature and the average room air temperature.

N-1
SECURITY GRILLE
& REGISTER

We Care For The Air You Breathe

O
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 SECURITY GRILLE & REGISTER

Security Grille Index

SECURITY GRILLES (FSG) & SECURITY REGISTER (FSR) O1

PRODUCT FEATURES O1

MATERIAL O1

FIXING O1
 SECURITY GRILLE & REGISTER

SECURITY GRILLES (FSG) & SECURITY REGISTER (FSR)

PRODUCT FEATURES
High quality extruded aluminium Frame and Face bars.
Adjustable vertical rear blades are available if required
With Opposed blade damper as required.
Heavy gauge galvanized steel wall sleeves

MATERIAL
Frame: Heavy duty extruded aluminium profile with 30 mm
flange width as standard.
Opposed Blade Damper: High quality extruded aluminium
profiles with natural aluminium finish. Black matt finish shall
be provided if required
Face bars: Heavy duty extruded aluminium profiles of 0°, 15°- 1 way
throw or 15°-2 way throw.
Available in powder coated RAL 9010 or 9016 as standard.
Other powder coated color finishes are available upon
request.

FIXING
FSG 1 FSG 2

FSR 1 FSR 2

O-1
FLOOR GRILLE

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 FLOOR GRILLE

Floor Grille Index

FLOOR GRILLE (FTFG) P1

PERFORMANCE DATA P1
 FLOOR GRILLE

FLOOR GRILLE (FTFG)

Flowtech Floor Grille is a floor mounted grille, used in cooling,
heating or air ventilation applications.
They are composed of a set of perforated sheets fixed to the
front and back of a frame
Standard perforated face is with (3/16) inch diameter holes on
(1/4) inch staggered centers.
The perforated sheet is made of 1.8mm thick Galvanized steel
powder coated.
4mm blades at 16mm pitch is made of extruded aluminium.
Removable face for cleaning and maintenance.
Standard size of 600mm x 600mm face and 550mm x 550 mm neck.
PERFORMANCE DATA

PERFORATED FLOOR GRILLE

Size (mm) Air Flow (L/S) / 550 mm Face Velocity (m/s) Pressure Drop (Pa) Throw (m) NC
200 0.7 - 3.0 <15
250 0.8 - 3.3 <15
300 1 - 3.8 <15
350 1.2 1 4.6 <15
400 1.3 5 5.1 17
450 1.5 7 5.5 18
550 X 550 500 1.7 11 6.2 21.6
550 1.8 17 6.8 27.6
600 2.0 22 7.7 32.4
650 2.1 29 8.6 36
700 2.3 38 9.5 42
750 2.5 50 11.1 48
800 2.6 64 12.9 54

P-1
ROUND STEP & FLOOR
SWIRL DIFFUSER

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Q
 ROUND STEP & FLOOR
SWIRL DIFFUSER

Round Step & Floor Swirl Diffuser Index

ROUND STEP SWIRL DIFFUSER (RSSD) Q1

PRODUCT FEATURES Q1

INSTALLATION Q1

ROUND FLOOR SWIRL DIFFUSER (RFSD) Q1

PRODUCT FEATURES Q1

BREAKING STATIC LOAD Q1

EFFECTIVE AREA OF SUPPLY AIR Q1

 ROUND STEP & FLOOR
SWIRL DIFFUSER
ROUND STEP SWIRL DIFFUSER (RSSD)
PRODUCT FEATURES
Used in theatres, halls, music halls, cinemas and other places.
The diffuser is installed on the vertical side of steps or on the ground.
There are four sections on the panel for blowing air producing a
swirl motion.
Every blade is vertical to each other.
The seams on the panel guarantee a horizontal blow.
The panel is fixed to the internal beam by central bolt with a
trim lid to cover.
For better conformability, the max. temperature difference
shall not exceed +/- 6T.
INSTALLATION DIMENSION
A (mm) B (mm) H (mm)
80 160 100
100 160 100
120 160 100
150 180 100
200 250 150

ROUND FLOOR SWIRL DIFFUSER (RFSD)

PRODUCT FEATURES
Round Floor Swirl Diffuser are mounted in the floor.
It is manufactured in cast Aluminium, drip trap and internal
swirl constructed in galvanized steel sheet.
High induction levels
Sizes available are 150 Ø and 200 Ø
BREAKING STATIC LOAD

Size 150Ø 200Ø

Load
Breaking
Position 128 117
A
Load
Load
(Kg)
Position 98 82
B

EFFECTIVE AREA OF SUPPLY AIR Load

Position C
52 77

Size 150 Ø 200 Ø Remarks

Area of Supply Air (m2) 0.0048 0.0172

Q-1
Head Office Abu Dhabi
PO Box 1871, Dubai, U.A.E. PO Box 10638, Abu Dhabi, U.A.E.
Tel.: +971 4 8105105 Tel.: +971 2 6219772
Fax: +971 4 8105106 Fax: +971 2 6219773
Email: flowtech@fjtco.com
www.flowtechind.com

Qatar Saudi Arabia Africa Regional Office - Tunisia

FJ Trading & Engineering Co. Tawreed Co. Faisal Jassim Trading Co. LLC
PO Box 31859, Doha, Qatar PO Box 240601, Riyadh, KSA Tel.: +216 71 460 862
Tel.: +974 4401 5777 Tel.: +966 14633338 Fax: +216 71 460 868
Fax: +974 4401 5775 Fax: +966 12939496 Mobile: +216 98 904 795

Iraq Oman
FJ General Trading Co. Ltd. FJ Engineering & Trading LLC
Iraq, Kurdistan, Erbil, Ainkawa PO Box 412, Muscat, Oman Part of
Mobile: +964 7700 366 020 Tel.: +968 24486365
Fax: +968 24486346