Vent-Axia Ventilation

Design Guidelines
This table provides suggested air changes
per hour (ACH) under normal conditions
based on Vent-Axias extensive experience.

Successful planning
Today, people are becoming increasingly
aware of the problems of indoor pollution
and the important contribution that
well-planned ventilation makes to modern
living.

Damaging condensation affects 4.5

million homes in the UK alone. This
can quickly cause paintwork and
wallpaper to deteriorate and encourages
mould, stains and a deterioration of the
property. So people are faced with
the expensive cost of redecorating.
Unfortunately, modern thermally efficient
buildings are not designed to encourage
natural ventilation. The Building
Regulations are recognising this problem
and, nationally, local authorities are
specifying higher rates of ventilation.
When installing ventilation it is most
important to obtain maximum efficiency
from the investment so proper planning is
essential.

The correct size, type and number of

Vent-Axia units required for any area is
determined by three factors: the room
size, its use and location.
First, work out the volume of the room by
multiplying length x width x height. This
volume is then multiplied by the required
number of air changes per hour (ACH)
given in the table to give the total air
movement required per hour. Select the
number of fans necessary to achieve the
desired volume.
The Building Regulations (Document F)
require the following ventilation rates on
new dwellings:
Kitchen areas: an extract rate of no less
than 216m3/h 60 l/sec. For calculation
purposes we recommend a minimum air
change rate of 15 per hour.
Utility rooms: an extract rate of no less
than 108m3/h 30 l/sec. For calculation
purposes we recommend a minimum air
change rate of 15 per hour.
Bathrooms: an extract rate of no less than
54m 3 /h 15 l/sec. For calculation
purposes we recommend a minimum air
change rate of 6 per hour.

4-8
20 - 30
4-8
6 - 10
2-4
6-8
15 - 30
10 - 12
8 - 12
3 - 10
6 - 10
15 - 20
1-3
10 - 15
12 minimum
10 - 20
8 - 12
8 - 10
12 minimum
12 - 15
20 - 30
10 - 12
15 - 30
3-5
8 - 10
15 - 30
6-8
25 - 60
6 minimum
10 - 15
15 - 25
6-8
15 - 20
30 minimum
6 - 15
10 - 15
10 - 30
6 - 15
5-8
3-5
3-6
6 - 10
6 - 10
10 - 20
10 - 15
12 minimum
15 - 25
10 - 12
8 - 12
5-7
8 - 15
15 - 20
3-6
4 minimum
10 - 15
6 - 10
15 - 20
15 - 30

WCs: an extract rate of no less than

6 l/sec. For calculation purposes we
recommend a minimum air change rate
of 6 per hour.

* Increase by 50% where heavy smoking

occurs or if the room is underground.

The new requirements are designed to

remove steam and smells at source before
they are able to migrate causing damage
to colder parts of the dwelling.

The total extract airflow rate during normal

operation of a continuous mechanical
ventilator eg. MultiVent etc, should be
between 0.5 and 0.7 ACH. This is based on
the whole dwelling volume, with provision to
increase the inlet volume, as required, in
moisture generation areas.

18

# Some commercial kitchens may require

higher ventilation rates, based on cooking
equipment in use.

In rooms containing fuel burning

appliances, care should be taken to
ensure that air replacement is
adequate for both the fan and the fuel
burning appliance.
Wiring should be carried out in
accordance with current IEE
regulations (UK) or the appropriate
Standards in your country.
Always check that the supply voltage,
fuse rating and wiring are correct and
that installation is in accordance with
the instructions provided with the
product.

Bathrooms
Vent-Axia recommends that mains
voltage fans be sited out of reach of a
person using a fixed bath or shower.
Ensure that mains fans and controls are
sited well away from all sources of
water spray. We recommend that
electrical products of this kind
be installed in accordance with
mandatory regulations and their official
guidance documents.

General

KITCHEN APPLICATIONS

Ventilation units should be placed as high

as possible in the window or wall near
any local smells and steam but not directly
above eye level grills, cookers or direct
sources of heat in excess of +40C. Do
not site in areas containing excessive
levels of grease without suitable filters.
In large rooms the extract points should
be positioned correctly to obtain even
ventilation in all areas. A short circuit of
airflow will be avoided by siting units as
far away as practicable from the main
source of air replacement.

RIGHT
WRONG

Maintenance
Site the fan so that it is accessible for
regular periodic cleaning and servicing.
Make sure that grilles, motor cooling ports
and impellers are able to function freely in
accordance with guarantee requirements.
Electrical equipment should be isolated
before carrying out any maintenance or
cleaning. All fans should be regularly
cleaned and checked, (every month or
so, dependent on usage). Bearings should
be oiled where appropriate twice a year,
unless stated otherwise.

Safety Extra Low Voltage (SELV) fans

are available for installation within
bath or shower rooms in accordance
with relevant wiring regulations. The
mains transformer control unit with SELV
output must be sited away from any
source of water spray and out of reach
of a person using a fixed bath or
shower.

DUCTED APPLICATIONS THROUGH

ROOF VOIDS

HORIZONTAL DUCT

Ducted applications
Ducts passing through an unheated
roof void should be insulated to
minimize condensate formation and
must include a condensation trap and
means of running off condensate.
Vertical ducts should be fitted with a
condensation trap and a weather
proof cowl of sufficient free area for
the air volume. Horizontal ducts should
fall away from the fan unit.

SELV fan installation

VERTICAL DUCT
Ensure pipes have a vertical overlap.

19

Ventilation Guidelines

Effective ventilation is now regarded

as a necessity because no-one can
feel their best or work efficiently in air
that contains smells, smoke, moisture or
excessive heat. Stale air in pubs, clubs,
offices and workshops is bad for
business. In the stuffy atmosphere
created by lack of ventilation, colds,
flu and airborne viruses will quickly
spread. Vent-Axia controlled ventilation
can help in all these situations
and reduces lost output caused by
absenteeism through illness.

What size of unit and

how many ?

Assembly rooms
Bakeries
Banks/Building Societies
Bathrooms
Bedrooms
Billiard Rooms *
Boiler Rooms
Cafes and coffee bars
Canteens
Cellars
Changing Rooms Main area
Changing Rooms Shower area
Churches
Cinemas and theatres *
Club rooms
Compressor rooms
Conference rooms
Dairies
Dance halls
Dental surgeries
Dye works
Electroplating shops
Engine rooms
Entrance halls & corridors
Factories and workshops
Foundries
Garages
Glasshouses
Gymnasiums
Hairdressing salons
Hospitals - sterilising
- wards
Kitchens - domestic
# - commercial
Laboratories
Laundrettes
Laundries
Lavatories
Lecture theatres
Libraries
Living rooms
Mushroom houses
Offices
Paint shops (not cellulose)
Photo & X-ray darkrooms
Public house bars
Recording control rooms
Recording studios
Restaurants
Schoolrooms
Shops and supermarkets
Shower baths
Stores & warehouses
Squash courts
Swimming baths
Toilets
Utility rooms
Welding shops

Siting the unit correctly

and safely

Condensation Control
What is condensation ?
There is always some moisture in the air,
even though we cannot see it. When that
moisture is allowed to accumulate in a
dwelling, the atmosphere becomes
saturated and condensation occurs which
can eventually result in damage to the
structure of the building and its contents.
This leads to expensive repairs and
maintenance plus associated discomfort to
the occupants. The point at which moist
air may begin to cause deterioration is
70% Relative Humidity (RH).

The British Isles have a naturally humid

environment. A humidity map will show
the regions which are regularly at, or in
excess, of 70% RH. An estimated 4.5
million British homes suffer from the
damaging effects of condensation.
Therefore we need to take extra
measures in this country to prevent the
expensive consequences of condensation
such as rotting window frames, peeling
wallpaper, mould growth, damp and
eventually, rotting of the building fabric
itself.

Not only does moist air cause problems

to the fabric of the building but also to
air quality and health. People who suffer
from asthma or any other bronchial
problems can have their condition
aggravated by a moist environment.
The microscopic droppings of the house
dust mite can cause asthma, rhinitis,
bronchial and other allergic problems.
Constant wholehouse ventilation can
reduce the relative humidity to below
70%, which inhibits the ideal living
and breeding conditions of the house
dust mite.

How to control
condensation
The results of condensation in a building
can be reduced by a combination of
measures: heating, correct insulation and
properly sited ventilation. Controlled
mechanical ventilation however, removes
moisture laden air at source before it can
condense, creating background level
ventilation throughout the dwelling.

Meeting the Regulations

controlled environment. Humidity

controllers can either be mounted
separately or contained within the fan,
the latter being convenient and easy
to install.

Safety Extra Low Voltage

fans (SELV)
VA100, Solo, Solo Plus, LuminAir and
LoWatt. Designed for areas where a fan
has to be fitted over a bath or within a
shower room, the Vent-Axia Safety Extra
Low Voltage fans can be installed within
the spray area of a bath or shower.
Control is by EN60 742 (BS 3535)
mains safety isolating transformer unit
with SELV output, which is sited away
from any source of spray and out of
reach of a person using a fixed bath or
shower. Available with the option of an
adjustable humidity controller.
To comply with low voltage directives,
Vent-Axia SELV units have been
independently tested in accordance with
UK and European Safety Extra Low
Voltage (SELV) requirements, and have
as a result been granted BEAB or
GS approval based on CENELEC
harmonised standards. The SELV 12
versions of the VA100, Solo and
LuminAir fans are certified as meeting the
requirement of IPX7 (BS EN60529).

IEE regulations for bathrooms

Classification of zones

Bathrooms are defined as areas of increased electrical hazard.

According to the Requirements for Electrical Installations, IEE
Wiring Regulations Sixteenth Edition, it is necessary to fit
ventilation products that meet a minimum of IPX4 in zones 1
and 2 of a bathroom. This means that when installed and
connected electrically, the product should prevent the ingress of
water splashing and remain electrically safe in use.
Vent-Axia SELV fans are IPX7, which makes them the safest
option available, and with a SELV supply offers complete
peace of mind. Vent-Axia offers a range of IPX4 fans which
also meets the regulations. A competent electrician should
install the product to ensure the integrity of IPX4 is maintained
around cable entries etc.

Zone 0:

The interior of the bath or shower tray.

Zone 1:

The exterior of the bath or shower tray to a

height of 2.25 metres above the floor.

Zone 2:

Extends to 0.60 metres beyond Zone 1 to a

height of 2.25 metres above the floor.

Zone 3.

Extends to 2.4 metres beyond Zone 2 to a height

of 2.25 metres above the floor.

For full information please refer to BS 7671 2001.

Vent-Axia still recommends that any fans installed within
Zones 1 and 2 should be SELV (Safety Extra Low Voltage)

Guide to siting equipment in a location containing a bath

NOTES:
(i)

Zone 0
0.75 m

Zone 1

2.4 m

0.6 m

0.6 m

Zone 2

2.4 m

Zone 3
2.25 m

**

Outside Zones

Space under
bath is Zone 1
if accessible
without a tool

recess
** Window
Zone 2

Condensation is aggravated by a
reduction in natural ventilation so
common in today's sealed and insulated
buildings which incorporate replacement
windows, draught proofing and fitted
carpets, etc.
If the moist air is unable to escape, it will
condense on cooler surfaces and migrate
to colder parts of the dwelling. Problems

Vent-Axia can also supply a range of

humidity controllers specifically designed
for kitchens and bathrooms to maintain
a totally automatic, condensation

(iii) Local supplementary bonding is required to

connect together the terminal of the protective
conductor of each circuit supplying Class I and
Class II equipment in zones 1,2 or 3, and
extraneous-conductive-parts in these zones.
(iv) All equipment to be suitable for the zone where
it is installed.

(v) Except for shavers, portable LV equipment is

not permitted.

Guide to siting equipment in a location containing a shower

NOTES:

**
2.4 m

(i)

This guide applies to a domestic shower room

containing a shower basin but withut a
permanently fixed partition. Reference should be
made to BS 7671, inlcuding the particular
requirements given in Section 601.

(ii)

Local supplementary bonding is required to

connect together the terminal of the protective
conductor of each circuit supplying Class I and
Class II equipment in zones 1,2 or 3, and
extraneous-conductive-parts in these zones.

Zone 0

0.75 m

Zone 1
0.6 m

0.6 m

Zone 2

2.4 m

Zone 3
Outside Zones

2.25 m

Best Practice

(ii) Reference should be made to Section 601 for

details of any installation in a location containng
a bathr or a shower.

(v) LV socket-outlets not permitted, except for a

shaver supply unit.

The Building Regulations for the United

Kingdom require mechanical ventilation
in all moisture generating areas to
remove humid air and odours from
shower rooms, bathrooms, toilets
kitchens and utility rooms.
The regulations are to ensure that
humidity is removed at source before it is
able to migrate causing damage to
colder parts of the dwelling. Vent-Axia
manufacture a range of domestic fans for
kitchens, utility rooms, bathrooms, toilets
and shower rooms designed to meet the
Building Regulations and help keep
condensation under control.

1 if the
* Zone
space is

accessible without
the use of a tool
Recess above
ceiling zone 2.

**

(iii) All equipment to be suitable for the zone where

it is installed.
(iv) LV socket-outlets not permitted, except for a shaver
supply unit.
(v)

Diagrams courtesy of the NICEIC

20

This guide applies only to a typical domestic

bathroom. It is not intended to replace Section
601 of BS 7671.

21

Except for shavers, portable LV equipment is

not permitted.

Condensation Control / Bathroom Regulations

The problems
condensation can cause

often start in the kitchen or bathroom,

where moisture is generated by cooking,
washing, drying clothes, showers and
bathing.

Bathroom Regulations

New
Features and Benefits
> Long life LoWatt motor lasts 5 times
longer than conventional motors.
> Uses up to 80% less energy.
> Meets current building regulations
when installed.
> Unique patented instant electric
opening shutter with positive closure.
> IP44 rated.

> Low sound levels.

>

keymark certified.

> 5 Year Guarantee.

The fan should

the Building
requirements
bathrooms and

be double insulated and meet

Regulation (Document F)
of 15 litres a second for
6 litres a second for toilets.

The electronically controlled motor is fitted with

long life ball bearings to provide an expected
50,000 hour running life and a Standard
Thermal Overload Protection (S.T.O.P.). The
motor should be insulated to Class III and is to
conform to BS EN 60335-2-80.

100

Shutters
Vent-Axia LoWatt fans have instant shutters using
the latest patented Integral Magnetronic
Control (IMC) technology - with no extra
power used to operate the shutter. When the
fan stops the shutter closes tightly, until the fan
operates again.

Installation
The LoWatt WC/bathroom 100mm axial
range is quick and simple to fit using reversible
grommets and easy-wire terminals. Suitable
for installation in walls or panels/ceilings at
any angle using kits available. The 100mm
telescopic wall kit uses no screws on the outside
grille. The wall kit is supplied with a telescopic
wall sleeve to fit walls 225 to 360mm thick.

Models
WC/toilets and bathroom models
LoWatt WCBP (Shutter/Pullcord) - Ultra long
life SELV motor. Pullcord On/Off override
switch. IP44 rated.
Stock Ref. No. 45 90 49
LoWatt WCBT (Shutter/Timer) - Integral
electronic adjustable overrun timer (5-25
minutes). IP44 rated.
Stock Ref. No. 45 90 50
LoWatt WCBH (Shutter/Humidity) - Complete
with wall mounted transformer and ambient
response humidity sensor with pullcord
override. IP44 rated.
Stock Ref. No. 45 90 51

WC and bathroom in-line models

FAQs Answered

LoWatt IP - Suitable for ducted installation.

Pullcord override switch. IP44 rated.
Stock Ref. No. 24 57 10

LoWatt fans can be installed at any

angle.
Use LoWatt Solo fans if more than 3m
of duct is needed.

LoWatt IT (Timer) - Ultra long life DC motor.

Suitable for wall, ceiling or ducted installation.
With integral electronic adjustable overrun
timer (5-25 minutes). IP44 rated.
Stock Ref. No. 24 58 10

The maximum length of 1.5mm2 cable

between transformer and fan is 8
metres.

Bathroom centrifugal models

Good Practice: Fit humidistat out of the

splash area. (See page 21 for further
details).
A mains PIR sensor is available.

The range meets the requirements of the

current Building Regulations for the ventilation
of WCs ie 6 l/s, bathrooms 15 l/s with a 15
minute overrun timer for internal rooms. Sensors
and auto-mode controllers save energy by
switching the ventilation units off when the room
is not occupied.

24

LoWatt Solo P (Pullcord) - Built-in airflow

backdraught shutter. Pullcord On/Off override
switch. IP44 rated.
Stock Ref. No. 111 05 000A

100mm Centrifugal P / T - Supply and install

a LoWatt fan with long life DC motor and
removable filter as manufactured by Vent-Axia
Ltd, Fleming Way, Crawley, West Sussex
RH10 9YX. Telephone: 01293 526062. The
fan case and grille shall be made from ABS
plastic and have a centrifugal impeller.
The fan should
the Building
requirements
bathrooms and

LoWatt WC/Bathroom

60
40

0 10 20 30 40 50 60 70 80 90
Volume (m3/h)

25

LoWatt Solo

Side view

Front view

20

be double insulated and meet

Regulation (Document F)
of 15 litres a second for
6 litres a second for toilets.

Window fixing hole 105mm

Panel fixing hole 105mm
Wall fixing hole 115mm

LoWatt In-Line (for duct applications)

15
10
5
0
0

Duct hole diameter

100mm.

20

40

60

80

100

120

Volume flow (m3/h)

The electronically controlled motor is fitted with

long life ball bearings to provide an expected
50,000 hour running life and a Standard
Thermal Overload Protection (S.T.O.P.). The
motor should be insulated to Class III and is to
conform to BS EN 60335-2-80.

Solo Window Model

Window fixing hole 113mm

Operation via pullcord/light switch or integral

overrun timer. IP44 rated.

LoWatt In-Line

The fan is to be wall mounted using a wall kit

25 41 00 (brown) or 25 41 02 (white) or
window mounted using 114 61 685A.

m3/h

l/s

dB(A) @ 3m

46
46

*
*

13
13

26
26

6.5
6.5
6.5

84
84
84

*
*
*

23
23
23

32
32
32

12
12

55
55

15
15

42
42

5.2
5.2

110
110

31
31

23

Model

Stock Ref. No.

Description

TOILET
LoWatt WCBP
LoWatt WCBT

Watts

45 90 49
45 90 50

axial/pullcord
axial/timer

2.5
2.5

BATHROOMS
LoWatt WCBP
LoWatt WCBT
LoWatt WCBH

45 90 49
45 90 50
45 90 51

axial/pullcord
axial/timer
axial/humidistat

A
B

Transformer (single gang)

WINDOW FITTING KIT 25 41 01

CENTRIFUGAL MODELS + WC/BATHROOM
LoWatt Solo P
111 05 000A
100mm centrifugal fan/pullcord
LoWatt Solo T
111 05 030A
100mm centrifugal fan/timer
SOLO WINDOW FITTING KIT 114 61 685A

LoWatt Solo T (Timer) - Built-in airflow

backdraught shutter. Integral electronic
adjustable overrun timer (5-25 minutes).
IP44 rated.
Stock Ref. No. 111 05 030A

A
B
C D E F G
154 50 63 98 35 94
98 80
155 140 36 98 85 55 60
87 33

Fan static pressure (Pa)

Vent-Axia LoWatt fan range features LoWatt long life motors that last 5 times longer
than conventional motors whilst delivering up to 80% energy savings. The extended
life of LoWatt fans is due to the use of high quality electronically controlled ball-bearing
DC motors especially developed for this range. Motors that operate effectively from a
single gang DC SELV transformer provided.

80

20

The 100mm fan is to be window mounted

using a window kit 25 41 01.
The fan is to be wall mounted using a wall kit
25 41 00 (brown) or 25 41 02 (white).

WC/Bathroom
In-line
LoWatt Solo
Transformer
Weight 1kg

110

Operation via pullcord or integral overrun timer.

Long Life Ventilation

Dimensions (mm)

Performance
Solo LoWatt (for duct applications)

WALL KIT for above models 25 41 02 White - 25 41 00 Brown

IN-LINE APPLICATIONS + WC/BATHROOM
LoWatt IP
24 57 10
100mm in-line/pullcord
LoWatt IT
24 58 10
100mm in-line/timer

*Installed performance when fitted with a wall kit. Measured with typical duct system resistance of 50 Pa.
25

For Wiring Diagrams see pages 221 and

223.

LoWatt - Long Life Ventilation - WC / bathroom and in-line fans

> Suitable for SELV applications.

Typical Specification
100mm Axial WCBP/WCBT/WCBH - Supply
and install a DC LoWatt fan with integral
magnetronic shutter (IMC) and removable
grille as manufactured by Vent-Axia Ltd,
Fleming Way, Crawley, West Sussex RH10
9YX, Telephone: 01293 526062. The fan
case and grille shall be made from ABS
plastic and have an axial impeller.

Fan static pressure (Pa)

WC & Bathroom fans

Silhouette 100
>

12mm stylish ultra low profile grille.

>

Downstream airflow guide vanes for

improved pressure development.

>

Ball bearing motors for vertical or

horizontal application.

>

>

Wall kit design ensures installed

performance to meet Building
Regulation Document F requirements.
DEMKO Approved.

Typical Specification

Performance

Supply and install a Silhouette axial fan for

installations in walls, panels or ceilings, with
backdraught shutters and guide vanes as
supplied by Vent-Axia Ltd, Fleming Way,
Crawley, West Sussex, RH10 9YX
Telephone: 01293 526062.
The fan performance should meet the
Building Regulations (Document F)
Requirements of 15 l/s for bathrooms or
toilets (30 minute timer overrun model for
internal WCs). The profile should be no
more than 12mm thick.

Dimensions (mm)

Silhouette 100

158

98

68

85

200

32

Silhouette
100mm

25

Weight 100mm 0.6kg

20
15

Silhouette 100

10

Features and Benefits

Static Pressure (Pa)

Mains Bathroom Fans

5
0
0

20

40

60

80

100

120

C
D

Volume m3/h

The motor should be a ball bearing motor for

installation at any angle and fitted with
Standard Thermal Overload Protection
(S.T.O.P.). The fan should be DEMKO
Approved.

100mm Wall model

Silhouette 100 - mains bathroom fans

Slimline Bathroom Ventilation

The Silhouette range is designed for modern living. With a slim profile of only 12mm, Silhouette blends in with the wall surface to
provide an unobtrusive installation. Silhouette has a FID performance of 95m3/h, and is double insulated, with a power consumption only 13 watts.
Careful design means a white sound spectrum understates the dB(A) sound levels providing optimised sound to performance output.
Mounted in the centre of the fan, beneath the
ultra slim profile grille, are the electronics,
incorporating a choice of integral control, a PIR
movement sensor to activate the product when
a person enters a bathroom or WC, a
humidistat for detecting a change in internal
humidity or an overrun timer option that is
adjustable between 5 and 30 mins. Silhouette
can be ceiling/panel mounted and connected
to an appropriate duct run to the outside.

Fixing hole diameter 115mm

(when wall kit used)

Models
Silhouette 100

- Single speed 100mm,

bathroom/toilet fan with neon running light and
backdraught shutter.
Stock Ref. No. 45 40 55

12mm actual profile

FAQs Answered
240V versions only.
Suitable for wall and panel mounting
only.
Backdraught prevention vanes
fitted on discharge

If ceiling mounted, 3m maximum of rigid

ducting should be used with a
condensation trap.

Silhouette 100T

White Stock Ref. No. 56 35 21

Brown Stock Ref. No. 56 35 41

Silhouette 100H - Single speed 100mm

bathroom/toilet fan with integral adjustable
auto humidity sensor from 60-90% RH,
adjustable electronic overrun timer (up to 20
mins) neon running light and backdraught
shutter.
Stock Ref. No. 45 40 57
- Single speed 100mm
bathroom/toilet fan. Integral PIR operated
model, (presence detector) with adjustable
electronic overrun timer (up to 30 mins) neon
running light and backdraught shutter.
Stock Ref. No. 45 40 58

26

Ivory Stock Ref. No. 56 14 01

Brown Stock Ref. No. 56 14 00

Quick fix 100mm Wall Grille

Silhouette 100TM

For Wiring Diagrams see pages 220.

Air replacement grille set

New Silhouette 100P - Single speed

100mm, bathroom/toilet fan with neon running
light, pullcord and backdraught shutter.
Stock Ref. No. 42 84 95
- Single speed 100mm
bathroom/toilet fan with integral adjustable
electronic overrun timer (up to 30 mins), neon
running light and backdraught shutter.
Stock Ref. No. 45 40 56

Integral humidity, timer and PIR controls.

Can be installed at any angle.

Accessories

100mm Wall Fitting Kits

Quick fix 100mm Airflow Shutter

White Stock Ref. No. 56 35 22
Brown Stock Ref. No. 56 35 42

Type

Stock
Ref. No.

Pullcord

Timer
30 mins

Humidistat
60-90%RH

PIR

Performance
Watts

m3/hFID

l/s

95

26

13

95

26

13

40

95

26

13

40

95

26

13

40

95

26

13

40

dB(A) @ 3m

For bathrooms and toilets

Silhouette 100

45 40 55

Silhouette 100P

42 84 95

Silhouette 100T

45 40 56

Yes

Silhouette 100H

45 40 57

Yes

Silhouette 100TM

45 40 58

Yes

Yes
Yes
Yes

Stock Ref. No. 254102 - White

Stock Ref. No. 254100 - Brown

27

40

VA100 SELV 12
Shower/Bathroom fan

Features and Benefits

>

>

Designed for the safe use in the spray

area of a bathroom or shower and
within reach of a person using a bath
or shower.
Provides the necessary 15 l/s
(54m3/h) to comply with Building
Regulation requirements for average
domestic bathrooms and WCs.
With electric shutter.

>

Fan IPX7 rated.

>

SELV Transformer to BS EN 60 742,

IP44 rated.

>

Window, wall or panel mounting.

Safety Extra Low Voltage

Can be installed at any angle.

If ceiling mounted a maximum of 3m
rigid ducting should be used with a
condensation trap.

VA100SVX 12 (Shutter)
IPX7 rated fan with thermo-electric shutter and
running light, complete with remote wall
mounted transformer. BEAB Approved.
Stock Ref. No. 25 83 10A

VA100SVXT12 (Shutter/Timer)
IPX7 rated fan with thermo electric shutter and
running light, complete with remote mounted
transformer with integral adjustable overrun
timer.
Stock Ref. No. 25 84 10A

Safety Extra Low Voltage

Fan (SELV)
Designed for areas where a fan has to be fitted
over or within zone 1 in a room containing a
fixed bath or shower according to IEE wiring
regulations (BS 7671), the VA100 SELV fan
can be safely installed within the spray area.
The fan is rated IPX7. Control is by mains
safety isolating IP44 transformer unit with SELV
output, which is sited away from any source of
spray and out of reach of a person using a
fixed bath or shower.
Vent-Axia SELV units have been independently
tested in accordance with UK and European
Safety Extra Low Voltage (SELV) and product
requirements, and have as a result been
granted BEAB approval based on CENELEC
harmonised standards.

The maximum length of 1.5mm2 cable

between transformer and fan is 8
metres.

Models
Panel Model
For discharging into ventilation shafts. It can
also be used with up to 3 metres of rigid
ducting. Performance 75m3/h, FID sound level
31dB(A).

Window Model
The VA100 window kit is designed to fit
VA100 units in windows and fixing surfaces up
to 40mm thick. The four spacers supplied are
placed on the inside of the glass to give
minimum exterior projection.

Wall Model
The VA100 wall kit is a rigid telescopic wall
sleeve for wall thicknesses from 255-360mm
thick plus an outside grille set. For thinner walls
the sleeves can be cut to fit.

Designed for window, wall or ceiling

mounting.

VA100SVXH 12 (Shutter/Humidity)*
IPX7 rated fan with thermo-electric shutter and
running light, complete with remote wall
mounted transformer. Integral Humidity Sensor
with pullcord override. BEAB Approved.
Stock Ref. No. 25 83 12B
* Where a VA100SV12 fan is installed
directly in the splash area, we recommend
VA100SVL12 or VA100SVX12 with an
Ecotronic 12V Humidistat mounted outside the
splash area to avoid saturation of the sensor.

Best Practice

A
mm
155
Transformer 148
Weight 0.55 kg

C
56
19

D
98
49

E
F
G
32 89 200

Fixing hole diameter 105mm

Window Model

Operation
VA100 SVX
VA100 SVL
VA100 SVXT

- via light switch

- via light switch
- via light switch with
timer overrun facility
VA100 SVXH - via integral humidity
sensor/transformer
pullcord override
VA100 SVLH* - via integral humidity
sensor/transformer
pullcord override

Fixing hole diameter 105mm

Wall Model

Performance

Fixing hole diameter 117mm

when wall kit is used.

20

Transformer
15

10

Use a plastic two gang mounting box of

minimum 28mm depth.
(MK 2142, Legrand 80848 or similar).
DO NOT use a metal mounting box.

18

36

54

72

90

For Wiring Diagrams see pages 221.

VOLUME (m3/h)

Stock
Ref. No

Window
Kit

White
Grille
Wall kit

Brown
Grille
Wall kit

Watts

dB(A)
@ 3m

VA100SVL12

25 81 10A

25 41 01

25 41 02

25 41 00

75

21

16

31

VA100SVX12

25 83 10A

25 41 01

25 41 02

25 41 00

75

21

18

31

Thermo

VA100SVXT12

25 84 10A

25 41 01

25 41 02

25 41 00

75

21

20

31

Thermo

VA100SVLH12

25 81 12A

25 41 01

25 41 02

25 41 00

75

21

18

31

VA100SVXH12

25 83 12B

25 41 01

25 41 02

25 41 00

75

21

20

31

Type

Extract performance
(panel model)
m3/h
l/s

Manufacturers of some fluorescent/low energy lighting systems indicate that these can interfere with other electronic/timing
circuits. For reliable operation of these circuits we recommend therefore that a tungsten filament light is used.

28

B
44
87

Panel Model

Sensors and auto mode controllers save energy

by only switching the ventilation units on when
needed and when the room is occupied.
To meet IEE Regulations timer models should be
isolated using a 3 pole isolator.
Stock Ref. No. 56 35 18

Integral humidistat and timer versions

available.

IPX7 rated fan with running light, complete

with remote wall mounted transformer. Integral
Humidity Sensor with pullcord override.
BEAB Approved.
Stock Ref. No. 25 81 12A

Dimensions (mm)

The fan performance should meet the Building

Regulation (Document F) requirements at
15 litres a second for bathrooms, and 6 l/s
for toilets (15 minute timer overrun model for
internal WCs). The motor should be
manufactured with self aligning sleeve
bearings and be fitted with Standard Thermal
Overload Protection (S.T.O.P.). The motor
should be insulated to Class B and designed
to operate on SELV 12v/1/50Hz.

STATIC PRESSURE (Pa)

FAQs Answered

IPX7 rated fan with running light, complete

with remote wall mounted transformer.
BEAB Approved.
Stock Ref. No. 25 81 10A

VA100SVLH 12 (Humidity)*

The Worlds first SELV fan providing extra safety and peace of mind in domestic shower
and bathrooms. The VA100 SELV12 from Vent-Axia is a 100mm axial extract fan which
can be safely installed over or within reach of a bath or shower in bathrooms and WC's.
A range of fans with optional shutter, timer and
humidity controlled versions to match
application requirements precisely. The VA100
SELV12 meets the Building Regulation
requirements of 15 l/s for bathrooms and
WC's. Designed in a clean white finish and
suitable for ambient temperatures up to +40C
the unit is fitted with Standard Thermal Overload
Protection (S.T.O.P.).

VA100SVL 12

Typical Specification
Supply and install a VA100 SELV (Safety Extra
Low Voltage) axial fan suitable for mounting
in panels, walls or windows, with a thermally
operated backdraught switch (SVL, SVXT,
SVXH models), removable grille and fan
running light as supplied by Vent-Axia Ltd,
Fleming Way, Crawley, West Sussex, RH10
9YX, Telephone: 01293 526062. When
installed the fan should comply with the 16th
Edition of IEE Regulations (BS7671, 2001)
and on site guide for safety extra low voltage
(SELV) operation. The transformer should be
safety isolating to BS EN 60742. The fan
should be rated to IPX7. The fan and
controller should be BEAB approved.

VA100 SELV 12 - shower / bathroom fans

>

Safety EXTRA Low

Voltage Range

29

Shutter

Thermo

VA100 Range
Features and Benefits
>

Provides the necessary 15 l/s

(54m 3/h) to comply with Building
Regulation (Document F) requirements
for average domestic bathrooms and
WCs.
Panel, Window or Wall mounting.

>

Model options with shutter, timer and

auto humidity control.

>

Available with instant electric shutter.

>

Sensors and auto mode controllers

save energy by switching the
ventilation units on only when needed
and when the room is occupied.

The fan performance should meet the

Building Regulation (Document F)
requirements of 15 litres a second for
bathrooms and 6 l/s for toilets,(15 minute
timer overrun model for internal WCs).
The fan should have a ball bearing motor for
installation at any angle. The motor should be
insulated to Class B.

The VA100 range from Vent-Axia is designed for domestic bathrooms and WC's. Available as window, wall or panel mounted models.
A range of fans with options of shutter, timer or humidity controlled versions.

VA100XT
VA100LH

The VA100 meets and exceeds the Building

Regulation (Document F) requirements of 15
l/s for domestic bathrooms with integral WC's.
Designed in a clean white finish. Suitable for
ambient temperatures up to +40C fitted with
ball bearing motors. IPX4 Rated.

Models
VA100L - Bathroom extract fan. BEAB Approved.
Stock Ref. No. 25 11 10

VA100LT (Timer) - Bathroom and WC fan

with adjustable electronic overrun timer and
neon light. BEAB Approved.
Stock Ref. No. 25 12 10
VA100X (Shutter) - Bathroom fan with
thermo-electric shutter, pullcord and neon light.
BEAB Approved.
Stock Ref. No. 25 13 10

FAQs Answered
All models are suitable for window, wall,
panel or ceiling installation.
Suitable for duct length up to 3m.
Built-in electrically operated shutter (X
version).
Wall and window kits available.
Available with integral timer or
humidistat.

VA100XT (Timer/Shutter)

- Bathroom fan
with adjustable electronic overrun timer, thermoelectric shutter and neon light. BEAB Approved.
Stock Ref. No. 25 14 10

VA100LH (Humidity)

- Bathroom fan with

presettable integral auto humidity control, neon
running light and pullcord. BEAB Approved.
Stock Ref. No. 25 16 10

VA100XH (Shutter/Humidity) - Bathroom

fan with presettable integral auto humidity
control, thermo-electric shutter, neon running light
and pullcord. BEAB Approved.
Stock Ref. No. 25 17 10
VA100XHT (Shutter/Humidity/Timer) Bathroom fan with presettable integral auto
humidity control and adjustable electronic overrun
timer, thermo-electric shutter and neon light.
Stock Ref. No. 25 15 10
30

VA100WCX (Shutter) - WC extract fan

with thermo-electric shutter, pullcord and neon
light. BEAB Approved.
Stock Ref. No. 25 18 10
VA100WCXT (Shutter/Timer) - With
adjustable electronic overrun timer,
thermoelectric shutter and neon light.
BEAB Approved.
Stock Ref. No. 25 19 10

VA100XH

VA100HT

To meet IEE Regulations, timer models should be

isolated using a 3 pole isolator.
Stock Ref. No. 56 35 18

A
B
mm
155 44
Weight 0.55 kg

C
56

D
98

E
32

F
89

G
200

20

Panel Model
15

10

Fixing hole diameter 105mm

Window Model
18

36

54

72

90

VOLUME (m3/h)

- via light switch

- via light switch
- via light switch with
timer overrun facility
- via light switch with
timer overrun facility
- via light switch with
integral humidity sensor
and pullcord fan override
- via light switch with
integral humidity sensor
and pullcord fan override
- via integral humidity
sensor/timer overrun
facility.

Accessories
Fixing hole diameter 105mm

Wall Model

Air replacement grille set

Ivory Stock Ref. No. 56 14 01
Brown Stock Ref. No. 56 14 00

Quick fix 100mm Wall Grille

Fixing hole diameter 117mm

when wall kit is used.

White Stock Ref. No. 56 35 21

Brown Stock Ref. No. 56 35 41

Timer
VA100 models are fitted with an electronic timer
which provides the necessary 15 minute overrun
time to comply with Building Regulation
(Document F) requirements for internal WC
ventilation. Adjustable from 3-20 minutes.

Dimensions (mm)

(Panel Model)

The fan should be BEAB approved.

Operation
VA100L
VA100X
VA100LT

Bathroom & WC Ventilation

Performance

For wiring diagrams see page 220.

115mm hole is
drilled with a core
cutter when using a
wall fitting kit.

Type

Then the telescopic

wall liner is fitted

Stock Ref. No.

Panel
Model

Window
Kit

Quick fix 100mm Airflow Shutter

White Stock Ref. No. 56 35 22
Brown Stock Ref. No. 56 35 42

White
Grille
Wall Kit

Brown
Grille
Wall Kit

Manufacturers of some fluorescent/low energy

lighting systems indicate that these can interfere
with other electronic/timing circuits. For reliable
operation of these circuits we recommend
therefore that a tungsten filament light is used.

Extract performance
(panel model)
m3/h
l/s

Watts

dB(A)
@ 3m

Shutter

VA100L

25 11 10

25 41 01

25 41 02

25 41 00

90

25

15

32

VA100LT

25 12 10

25 41 01

25 41 02

25 41 00

90

25

15

32

VA100X

25 13 10

25 41 01

25 41 02

25 41 00

90

25

20

32

Thermo

VA100XT

25 14 10

25 41 01

25 41 02

25 41 00

90

25

21

32

Thermo

VA100LH

25 16 10C

25 41 01

25 41 02

25 41 00

90

25

16

32

VA100XH

25 17 10C

25 41 01

25 41 02

25 41 00

90

25

21

32

Thermo

VA100XHT

25 15 10

25 41 01

25 41 02

25 41 00

90

25

21

32

Thermo

VA100WCX

25 18 10

25 41 01

25 41 02

25 41 00

70

19

18

30

Thermo

VA100WCXT

25 19 10

25 41 01

25 41 02

25 41 00

70

19

19

30

Thermo

31

VA100 Range - axial extract bathroom and WC fans

>

Typical Specification
Supply and install a VA100 mains axial fan
suitable for mounting in panels, walls or
windows, with thermally operated
backdraught shutter (X, XT, XH and XHT
models only), removable grille and fan
running light as supplied by Vent-Axia Ltd,
Fleming Way, Crawley, West Sussex, RH10
9YX Telephone: 01293 526062.

STATIC PRESSURE (Pa)

Axial Extract Fans

Vent Light

Features and Benefits

>

>

The original
combination.

fan

and

light

>

IPX7 rated.

>

Suitable for shower enclosures and

wet areas - can be used within reach
of a person using a bath or shower.
Safety extra low voltage (SELV).

>

Easy installation.

The IPX7 unit is installed directly over a shower

in complete safety. Vent-Axia LuminAir extracts
moisture and humidity at source, preventing
damaging condensation from spreading. At the
same time it bathes the shower enclosure in a
rich soft light - bringing any dark shower to life.
Ideal for all types of bathroom and shower
applications, and is particularly suitable for
bedsit and en-suite shower installations.

transformer to BS EN 60742 is mounted in a

purpose made enclosure that can be wall
mounted or sited in the loft, and is designed to
accept mini trunking (LuminAir L transformer IP20 - loft mounted).
LuminAir has a 20 Watt 40 spread, pre-formed
Dichroic Multi-Mirror lamp, to give a pool of
soft warm light. The lamp has a long life and is
simple to change.

Designed for mounting in a wide variety of

ceiling thicknesses. The safety isolating

Models
LuminAir L - Fan & light.
Provides simultaneous fan and light operation
from the bathroom light switch.
Stock Ref. No. 18 81 10

LuminAir T (Timer) - Fan & light.

Switches the fan On with the light. When the
light is switched Off, the fan continues to run for
an adjustable set period to meet the building
regulations for internal bathrooms.
Stock Ref No. 18 82 10

LuminAir H (Humidity) - Fan & light.

Combines a light activated by the bathroom
light switch and an Ecotronic Humidity Sensor
which will switch the fan On whenever the
humidity level warrants.
Stock Ref. No. 18 86 10

FAQs Answered
The max. length of 1.5mm 2 cable
between Transformer and fan is 8
metres.

Supply to the LuminAir transformer

220-240V/1/50Hz.
Output to LuminAir 12V SELV/1/50Hz. Safety
isolating transformers conform to BS EN 60742.

All controls are included, no extra

sensors needed.
Roof, wall and soffit terminations can
be used.
Clearance above the ceiling for the fan
and light model must be at least
180mm when using the 90 bend.
Maximum 20W sealed lamp to be
used (as supplied).

F G

15

Transformer (L)

83 76 70 61

Humidity Sensor

87 33

Fixing hole diameter 110mm

10

LuminAir Vent Light installation

For upgrading existing extract systems or to
provide multiple extract points to a central fan.
The Vent Light consists of a LuminAir Safety
Extra Low Voltage (SELV) light with white ceiling
bezel and 90 bend. The bend is especially
suitable for connection to extract ductwork runs
between joists. On/Off operation is via the
bathroom light switch. Gold and silver bezels
are available as accessories.
Stock Ref. No. 45 33 95 - White

Typical Specification

0
0

20

40

60

80

100

120

Volume (m3/h)

Fan & Light

Vent Light

Transformer/Control (T & H)

Accessories

Supply and install a Luminair Safety Extra

Low Voltage (SELV) in line fan and light
combination as manufactured by Vent-Axia Ltd,
Fleming Way, Crawley, West Sussex, RH10
9YX, Telephone 01293 526062. When
installed the fan complies with the 16th edition
of IEE Regulations (BS7671), 2001) and an
on site guide for Safety Extra Low Voltage
(SELV) operation. The transformer should be
safety insulating to BS EN 60742. The fan
should be rated to IPX7. The fan and
transformer should be BEAB approved.

Soffit termination set

Stock Ref. No. 56 35 13

LuminAir Transformer (L)

100mm Flexible ducting
Stock Ref. No. 56 36 04 (3m length)

The fan performance should meet the Building

Regulation (Document F) requirements.
The motor should be manufactured with self
aligning sleeve bearings and fitted with
Standard Thermal Overload Protection,
(S.T.O.P.) the motor should be insulated to
Class B and designed to operate on SELV
12V/1/50Hz.
Operation:
Luminair L
Luminair T

- via light switch

- via light switch with
timer overrun facility
- with adjustable
humidity sensor

Humidity Sensor (H)

100mm Condensation trap

Stock Ref. No. 56 35 16
For installation details see page 19.

Manufacturers of some fluorescent/low energy

lighting systems indicate that these can interfere
with other electronic/timing circuits. For reliable
operation of these circuits we recommend
therefore that a tungsten filament light is used.

For Wiring Diagrams see pages

227 and 229.

Type
LuminAir L

LuminAir
Stock Ref. No.
White
18 81 10

Amps
@ 240V
0.2

LuminAir T

18 82 10

0.2

110

LuminAir H

18 86 10

0.2

110

Sectional view of LuminAir

32

150 140 98 103 150 10180

Transformer (T&H) 175 90 55 30

20

Luminair H

European Patented No. EP0730716

Australian Patent No.
677461
South African Patent No. 94/8865
Other world patents applied for

A
LuminAir

Free Air Extract

performance
m3/h
l/s
110
31

Bezel Accessory Colour

Stock Ref. No.
Stock Ref. No.
Chrome
Gold
45 20 44
45 20 45

Max
Watts
40

dB(A)
@ 3m
35

31

42

35

45 20 44

45 20 45

31

44

35

45 20 44

45 20 45

Stylish Chrome or Gold Bezels are also available.

33

LuminAir - Axial - fan and light for shower enclosures

>

Dimensions (mm)

25

For complete ducted kits, see pages

3435.

Safety Extra Low Voltage

The revolutionary Vent-Axia LuminAir Safety Extra Low Voltage fan and light in a single
ceiling mounted fitting.

Performance

Illuminated air inlet for powered ducted

systems

Static Pressure (Pa)

Fan & Light

LuminAir Ventilation Kit

LuminAir Turbo Ventilation Kit

Features and Benefits

Dimensions (mm)
A

> Unique fan and light combination.

> IPX7 rated inlet assembly.

Vent Light

150 180

10

Turbo Fan

100 132 105 136 70 145

Ceiling Fixing hole diameter 110mm

> Suitable for shower enclosures and wet

areas - can be used within reach of a
person using a bath or shower.

Vent Light and Bend

> Safety extra low voltage (SELV) lamp.

> Easy installation.

> BEAB Approved.

LuminAir Turbo Ventilation Kit

Safety Extra Low Voltage

LuminAir is now additionally available in the form of a ventilation kit. The IPX7 unit is
installed directly over a shower in complete safety.

Models
LuminAir Ventilation Kit

Vent-Axia LuminAir extracts moisture and

humidity at source, preventing damaging
condensation from spreading. At the same time
it bathes the shower enclosure in a rich soft light bringing any dark shower to life. Ideal for all
types of bathroom and shower applications,
and is particularly suitable for bedsit and ensuite shower installations.

LuminAir L, T or H SELV fan and light, choice of

bezel, 90 bend, 3m of flex-duct, wall grille
and cable ties.

LuminAir Shower Ventilation Kit L

Provides simultaneous fan and light operation
from the bathroom light switch.

LuminAir Shower Ventilation Kit T

European Patented No. EP0730716
Australian Patent No.
677461
South African Patent No. 94/8865
Other world patents applied for

FAQs Answered
The maximum length of 1.5mm2 cable
between Transformer and fan is 8
metres.

Switches the fan On with the light. When the

light is switched Off, the fan continues to run for
an adjustable set period.

LuminAir Shower Ventilation Kit H

Combines a light activated by the bathroom
light switch and an Ecotronic Humidity Sensor
which will switch the fan On whenever the
humidity level warrants.

For applications where a more powerful

system is required. The kit comprises a
LuminAir Turbo L or T mains fan and SELV
light, choice of bezel, 90 bend, 6 metres
of flexible duct, quick fix wall grille and
four cable ties. Meets Building Regulations
(Document F) performance assuming
ductwork provided is fully extended and one
90 bend.

LuminAir Turbo SKL

Provides simultaneous On and Off operation
of the fan and light from the bathroom light
switch.

LuminAir Turbo SKT

Switches the fan On with the light. When the
light is switched Off, the fan continues to run
for an adjustable fixed period to meet the
Building Regulations for internal bathrooms.

LuminAir Kit
*Transformer (T&H)
*Transformer (L)
*Humidity Sensor

Roof, wall and soffit terminations can

be used.

A
150
175
83
87

B
180
90
76

C
D
F
139 98 10
55
30
70
61
33 *see previous page

Fixing hole diameter 110mm

Clearance above the ceiling must be at

least 180mm.
Maximum 20W sealed lamp to be
used.

Supply and install a Luminair in-line fan and

light kit combination as manufactured by
Vent-Axia Ltd, Fleming Way, Crawley,
West Sussex, RH10 9YX, Telephone:
01293 526062. When installed the light
complies with the 16th edition of IEE
Regulations (BS7671), 2001) and an on site
guide for Safety Extra Low Voltage (SELV)
operation. The transformer should be safety
insulating to BS EN 60742. The fan and
transformer should be BEAB Approved.
The fan should meet the installed
performance of the Building Regulation
(Document F) Requirements - 15 litres a
second for bathrooms and 6 litres for toilets,
(15 minute timer overrun model for internal
rooms).
The motor should be manufactured with self
aligning sleeve bearings and fitted with
Standard Thermal Overload Protection,
(S.T.O.P.) the motor should be insulated to
Class B.

Dimensions (mm)

All controls are included, no extra

sensors needed.

Typical Specification

Stylish Silver or Gold Bezels are also available.

Manufacturers of some fluorescent/low energy
lighting systems indicate that these can interfere with
other electronic/timing circuits. For reliable operation
of these circuits we recommend therefore that a
tungsten filament light is used.

For Wiring Diagrams see pages 228

and 229.

Free Air Extract

performance
m3/h
l/s
110
31

Type
LuminAir Ventilation Kit L

Stock Ref. No.

White
45 34 10

Stock Ref. No.

Chrome
45 34 11

Stock Ref. No.

Gold
45 34 12

Amps
@ 240V
0.2

Max
Watts
40

dB(A)
@ 3m
35

LuminAir Ventilation Kit T

45 34 13

45 34 14

45 34 15

0.2

110

LuminAir Ventilation Kit H

45 34 16

45 34 17

45 34 18

0.2

110

31

40

35

31

40

35

LuminAir Turbo SKL

45 34 19

45 34 20

45 34 21

0.3

LuminAir Turbo SKT

45 34 22

45 34 23

45 34 24

0.3

160

44

35

38

160

44

35

38

Fan

34

35

LuminAir - Turbo fan and light for shower enclosures

Turbo Fan

Vent-Axia Minivent

Features and Benefits

> IP44 rated.
> Powerful axial in-line fan with
downstream airflow guide vanes.
> Complete kit supplied.
> Simple installation.
> Meets Building Regulation
Requirements for WCs.
> Integral timer version, set at 15 minute
overrun.

Typical Specification
Supply and install a Minivent in-line ducted
fan kit including white ceiling grille and
spigot, 3 meters of flexible ducting and an
external louvre as manufactured by Vent-Axia
Ltd, Fleming Way, Crawley, West Sussex,
RH10 9YX, Telephone: 01293 526062.
When installed the fan performance should
meet the Building Regulation (Document F)
requirements.

Performance

mm

The motor should be manufactured with self

aligning sleeve bearings and be fitted with
Standard Thermal Overload Protection
(S.T.O.P.) the motor should be insulated to
Class B.
Operation:
Minivent SK
Minivent SKT

Dimensions (mm)

20

Fan static pressure (Pa)

Ducted Bath/Shower
Fan Kit

20

40

60

80

100

120

Accessories

Control

Timer Model
15 minute overrun timer complies with
Building Regulations Document F. The timer is
triggered by the lighting circuit. Pre-wired for
easy installation.

For Wiring Diagrams see pages 225.

Ambient Response Humidity Sensor

An electronic On/Off wall mounted humidistat,
which reacts to any rapid increase in both
humidity and temperature, switching a
Vent-Axia fan On for rapid removal of
moisture laden air. Night time RH increment
setback feature suppresses nuisance tripping
when the humidity level gradually rises as the
temperature falls. Stock Ref. No. 56 35 50

Enclosed terminal compartment, Class 1 earthed

appliance.
Supply voltage 220-240/1/50Hz.

Air replacement grille set

For air replacement through doors and panels.
Consists of a two piece telescopic set, which
fits unobtrusively on either side of the door or
panel. Minimum fixing thickness 30mm.
Material: ABS Plastic.
Dimensions: 454 x 90mm.
Size of hole: 435 x 76mm.
Ivory Stock Ref. No. 56 14 01
Brown Stock Ref. No. 56 14 00

Fan cable

Ecotronic Humidity Sensor

Self programming electronic On/Off wall
mounted humidity sensor which reacts to any
rapid increase in humidity.
Dim. 87 x 87 x 33mm (L x H x D).
Stock Ref. No. 56 35 32

Suitable for use with remote humidistats

where required.
To prevent backdraughts fit a Quick fix
airflow shutter.

Maximum recommended length of

ducting: 3 metre (supplied).

Stock Ref. No.

m3/h
fid

l/s

Watts

dB(A)
@ 3m

VA Minivent SK

24 87 10

110

30

20

37

VA Minivent SKT
with timer

24 88 10

110

30

22

37

Model

Inlet grille

Outlet grille
Loft and duct insulation
omitted for clarity

36

37

Minivent - ducted bath / shower fan Kit

cut to the required length and the bend radius

kept to a maximum to provide the best fan
performance.

Built-in Controls

FAQs Answered

A 15 minute overrun timer version is

available (SKT).

115

Volume flow (m3/h)

- via light switch

- via light switch
with timer overrun
facility

Minivent Shower Kit installation - installed

Roof, wall and soffit termination

accessories can be used.

C (Timer)

98

The Vent-Axia Minivent ducted bath/shower kit includes all the components necessary to
install a ducted 100mm system in one box. This simplifies fitting of an efficient ventilation
system to small rooms, including bath and shower rooms and WC's. It is especially
suitable for en-suite bathrooms.

The kit consists of a Minivent IP44 In-Line fan,

a white ceiling grille and spigot, 3 metres* of
flexible duct and an external louvre for soffit
or wall mounting. The duct should be

10

Powerful Axial In-Line Fan

The fan kit has ample performance to meet the

Building Regulations Requirements for WC's.
The timer version should be used for internal
rooms.

A
80

New Solo Plus

Features and Benefits

>

Built-in washable filter feature.

>

Meets the Building Regulation

(Document F) requirements for
domestic bathrooms and WC's.

>

IPX4 rated.

>

Flush or surface mountable.

>

Adjustable rear or side exit spigot.

>

Extremely low sound levels.

Typical Specification

Performance

Supply and Install a Solo Plus Centrifugal fan

as supplied by Vent-Axia Ltd, Fleming Way,
Crawley, West Sussex, RH10 9YX,
Telephone: 01293 526062.
The fan should be suitable for flush or surface
mounting, for wall, panel and ducted
applications. The fan should have a 100mm
spigot with integral backdraught shutter
capable of changing its orientation to receive
rear entry or vertical ducting. The fan should
be able to offer constant trickle ventilation
boosted by various integral sensors.

Dimensions (mm)

160

mm

140
Static Pressure (Pa)

Centrifugal Extract Fan

120

High Boost

100
80

261

221

107

54.5

98

64

61

253

208

37

98

70

Solo + Weight 2.7kg

60
Low Boost

40

Trickle

20
0

Front view
0

20

40

60

80

100

Volume (m3/h)

The fan performance should meet the building

regulations (Document F) requirements of 15
litres a second for bathrooms and 6l/s for
toilets. (15-minute timer over run for internal
rooms). The motor should be a highly efficient
ball bearing capacitor type motor and should
be insulated to class B and be fitted with
standard thermal overload protection (STOP).

Long Life Ventilation

G
F
E

The new Solo Plus range from Vent-Axia has been specially designed for through the wall and ducted applications, suitable for internal
bathrooms, WCs and other small rooms. Finished in white, the Solo Plus can be flush or surface mounted, with a 2-position 100mm
circular spigot for rear entry or connecting to a vertical ducting system. The powerful centrifugal forward curved impeller allows
installations using 100mm ducting in straight runs up to 50m, whilst still achieving 54m3/h as required by Document F of the current
building regulations.
The new Solo Plus has a choice of two
boost/override motor speeds, medium
(62m3/h) or high (90m3/h), with an optional
third speed for constant trickle ventilation
(36m3/h), selectable at installation. Depending
on the model, the fan will switch from trickle (if
selected) to boost (medium or high) via the
pullcord/light switch/humidity sensor/PIR.

FAQs Answered
Constant trickle option with choice of two
boost speeds (not available on P
version).
T and HT models have a two minute
delay timer with adjustable overrun timer.
Designed for panel/wall installations,
flush or surface mounting either in a
horizontal or vertical plane.
Available integral timer, humidistat timer
or PIR controls.

Four models are available offering features such

as, Pullcord, Timer, Humidistat/Timer or PIR
versions. All models can be wall; panel or
ceiling mounted and can be connected to either
circular, rectangular or Vent-Axias System 25
flat ducting, which has been specially designed
for concealed applications that can benefit from
its ultra slim 25mm depth.
Cable entry is achieved through a rear entry
grommet on the top right hand side of the unit.
Enclosure of the electrical components is
manufactured from flame retardant grade
material.
Supply voltage 220-240V/1/50Hz.

Motor
Incorporated into the Solo Plus is a highly
efficient ball bearing capacitor run motor.
Capacitor run motors offers the benefit of being
over 50% more efficient than conventional
shaded pole motors within its class. The
fully enclosed motor is fixed onto a 3 position
anti-vibration mount which offers higher
reliability and lower noise.

Panel Recess Mount

Models

38

SOLO PLUS P (Pullcord)

Flush or surface mountable. Control by Pullcord
or from light/remote switch or sensor. 3 Speed.
Stock Ref. No. 42 74 77

The 100mm circular spigot on the back of the

Solo Plus offers 2-position ducting entries. The
spigot is factory set for rear entry applications,
but can be slid out, turned through 90o and
refitted for vertical ducting installations.

SOLO PLUS T (Timer)

Flush or surface mountable. Constant trickle
option. 2 Speed. Adjustable timer overrun.
Delay on timer.
Stock Ref. No. 42 74 78

Can be installed either as recess or surface

mounted as standard. No other accessories
are required.

SOLO PLUS HT (Humidistat-timer)

Flush or surface mountable. Humidity controlled
2 speed fan. Constant trickle option. Adjustable
timer overrun. Delay on timer. Adjustable
humidity sensor.
Stock Ref. No. 42 74 79

SOLO PLUS TM (Timer/PIR)

Flush or surface mountable. Control by integral
PIR detector. Constant trickle option. 2 Speed.
Constant trickle option.
Stock Ref. No. 42 74 80

Flush fitted model

Type

Stock Ref. No.

Solo Plus P
42 74 77
Solo Plus T
42 74 78
Solo Plus HT
42 74 79
Solo Plus TM
42 74 80
Tested at 240VAC @ 50Hz

Suitable for use with System 25 and

System 50 ducting.

Surface mounted model

Washable removable filter

Extract Performance m3/h (l/s)

High
Med
Trickle
90 (25)
62 (17)
36 (10)
90 (25)
62 (17)
36 (10)
90 (25)
62 (17)
36 (10)
90 (25)
62 (17)
36 (10)

High
29
29
29
29

39

Watts
Med
21.1
21.1
21.1
21.1

For Wiring Diagrams see pages 220.

Trickle
20.3
20.3
20.3
20.3

Sound dB(A) @ 3m
High Speed
Trickle
40.3
25.7
40.3
25.7
40.3
25.7
40.3
25.7

Solo Plus - centrifugal extract bathroom fan

Surface Mount Side view

New Solo Plus LoWatt

Features and Benefits
>

Up to 80% energy saving.

>

Integral LoWatt power supply.

>

Built-in washable filter feature.

>

Meets the Building Regulation

(Document F) requirements for
domestic bathrooms and WC's.
IPX4 rated.

>

Flush or surface mountable.

>

Adjustable rear or side exit spigot.

>

Extremely low sound levels.

Long Life Ventilation

The new Solo Plus LoWatt range from Vent-Axia has been specially designed for through the wall and ducted applications, suitable for
internal bathrooms, WCs and other small rooms. Finished in white, the Solo Plus LoWatt can be flush or surface mounted, with a
2-position 100mm circular spigot for rear entry or connecting to a vertical ducting system. The powerful centrifugal forward curved
impeller allows installations using 100mm ducting in straight runs up to 50m, whilst still achieving 54m3/h as required by Document F of
the current building regulations.
The new Solo Plus LoWatt has an adjustable
boost speed which is set at installation variable
between 57-105m 3 /h for boost/override
operation to meet Building Regulations thus
ensuring minimum energy usage and low sound
levels. All models have an optional speed for
constant trickle ventilation (25m3/h), selectable
at installation. Depending on the model, the fan
will switch from trickle (if selected) to boost via
the pullcord/light switch/humidity sensor/PIR.

FAQs Answered
Constant trickle option with variable
speed boost.
T and HT models have a two minute
delay timer with adjustable overrun timer.
Designed for panel/wall installations,
flush or surface mounting either in a
horizontal or vertical plane.

Four models are available offering features such

as, Pullcord, Timer, Humidistat/Timer or PIR
versions. All models can be wall; panel or
ceiling mounted and can be connected to either
circular, rectangular or Vent-Axias System 25
flat ducting, which has been specially designed
for concealed applications that can benefit from
its ultra slim 25mm depth.
Cable entry is achieved through a rear entry
grommet on the top right hand side of the unit.
Enclosure of the electrical components is
manufactured from flame retardant grade
material.
Supply voltage 220-240V/1/50Hz.

Motor
Incorporated into the Solo Plus LoWatt is a
highly efficient DC long life ball bearing motor.
DC motors offer the benefit of over 80%
efficiency over conventional shaded pole motors
within their class. The fully enclosed motor is
fixed onto a 3 position anti-vibration mount
which offers higher reliability and lower noise.

Available integral timer, humidistat timer

or PIR controls.

Models

The fan should

the Building
requirements
bathrooms and

mm

180
160
140
120
100

261

221

107

54.5

98

64

61

253

208

37

98

70

Solo + LoWatt Weight 2.2kg

80
60
40
20
0

Front view
0

20

40

60

80

100

120

Volume (m /h)

The shaded area indicates the variable

speed boost range, adjustable at installation.

be double insulated and meet

Regulation (Document F)
of 15 litres a second for
6 litres a second for toilets.

The electronically controlled DC motor is fitted

with long life ball bearings to provide an
expected 40,000 hour running life and a
Standard Thermal Overload Protection
(S.T.O.P.). The motor should be insulated to
Class III and is to conform to BS EN 60335-2-80.

Surface Mount Side view

C

G
F
E

Operation via pullcord/light switch or integral

overrun timer. IPX4 rated.
The fan is to be wall mounted using a wall kit
25 41 00 (brown) or 25 41 02 (white) or
window mounted using 114 61 685A.

Flush or surface mountable. Control by Pullcord

or from light/remote switch or sensor.
2 Speed. Constant trickle option. Adjustable
boost. In-built LoWatt controller.
Stock Ref. No. 42 74 81

Panel Recess Mount

I

The 100mm circular spigot on the back of the

Solo Plus offers 2-position ducting entries. The
spigot is factory set for rear entry applications,
but can be slid out, turned through 90o and
refitted for vertical ducting installations.

SOLO PLUS LoWatt T (Timer)

Flush or surface mountable. Control by room
light or switch. 2 Speed. Constant trickle
option. Adjustable boost. Adjustable timer
overrun. Delay on timer. In-built LoWatt
controller.
Stock Ref. No. 42 74 82

Can be installed either as recess or surface

mounted as standard. No other accessories
are required.

NOTE: The Transformer is an integral part of

the fan which MUST NOT be installed as a
SELV product.

SOLO PLUS LoWatt HT (HumidistatTimer)

Flush or surface mountable. Humidity controlled
auto-variable speed 2 fan with pullcord.
Constant trickle option. Adjustable boost.
Adjustable timer overrun. Delay on timer.
Adjustable humidity sensor. In-built LoWatt
controller.
Stock Ref. No. 42 74 83

Flush or surface mountable. Control by integral

PIR detector. 2 Speed. Constant trickle option.
Adjustable boost. In-built LoWatt controller.
Stock Ref. No. 42 74 84

40

The fan should be suitable for flush or surface

mounting, for wall, panel and ducted
applications. The fan should have a 100mm
spigot with integral backdraught shutter
capable of changing its orientation to receive
rear entry or vertical ducting. The fan should
be able to offer constant trickle ventilation
boosted by various integral sensors.

Dimensions (mm)

200

SOLO PLUS LoWatt P (Pullcord)

SOLO PLUS LoWatt TM (Timer/PIR)

Suitable for use with System 25 and

System 50 ducting.

Performance

Flush fitted model

Type
Solo
Solo
Solo
Solo

Stock Ref. No.

Plus
Plus
Plus
Plus

LoWatt
LoWatt
LoWatt
LoWatt

P
T
HT
TM

42 74 81
42 74 82
42 74 83
42 74 84

Surface mounted model

Washable removable filter

Extract Performance m3/h (l/s)

High
Med
Trickle
105 (29)
57 (16)
25 (7)
105 (29)
57 (16)
25 (7)
105 (29)
57 (16)
25 (7)
105 (29)
57 (16)
25 (7)

High
21
21
21
21

Tested at 240VAC @ 50Hz

41

Watts
Med
6.5
6.5
6.5
6.5

For Wiring Diagrams see pages 224.

Trickle
5.3
5.3
5.3
5.3

Sound dB(A) @ 3m
High Speed
Trickle
42.8
23.7
42.8
23.7
42.8
23.7
42.8
23.7

Solo Plus LoWatt - centrifugal extract bathroom fan

>

Typical Specification
Supply and Install a Solo Plus LoWatt
Centrifugal fan as supplied by Vent-Axia Ltd,
Fleming Way, Crawley, West Sussex, RH10
9YX, Telephone: 01293 526062.

Static Pressure (Pa)

Centrifugal Extract Fan

New Solo Plus SELV

Features and Benefits

>

Solo PLUS SELV is suitable for

installation over or within reach of
a shower or bath.

>

Built-in washable filter feature.

>

Meets the Building Regulation

(Document F) requirements for
domestic bathrooms and WC's.
Flush or surface mountable.

>

Adjustable rear or side exit spigot.

>

Extremely low sound levels.

>

IPX7 rated.

>

Transformer complies with

BS EN 60742.

Long Life Ventilation

The new Solo Plus SELV range from Vent-Axia has been specially designed for use in the splash area of a bathroom in either through the
wall and ducted applications, suitable for internal bathrooms, WCs and other small rooms. Finished in white, the Solo Plus SELV can be
flush or surface mounted, with a 2-position 100mm circular spigot for rear entry or connecting to a vertical ducting system. The powerful
centrifugal forward curved impeller allows installations using 100mm ducting in straight runs up to 50m, whilst still achieving 54m3/h as
required by Document F of the current building regulations.
The new Solo Plus SELV has an adjustable boost
speed which is set at installation variable between
57-100m3/h for boost/override operation to
meet Building Regulations thus ensuring
minimum energy usage and low sound levels.
All models have an optional third speed for
constant trickle ventilation (25m3/h), selectable
at installation. Depending on the model the fan
will switch from trickle (if selected) to boost via
the pullcord/light switch/humidity sensor/PIR.

FAQs Answered
Constant trickle option with variable
speed boost.
T and HT models have a two minute
delay timer with adjustable overrun timer.
Designed for panel/wall installations,
flush or surface mounting either in a
horizontal or vertical plane.
Available integral timer, humidistat timer
or PIR controls.
Suitable for use with System 25 and
System 50 ducting.
The maximum length of 0.75mm cable
between transformer and fan is 8 metres.
2

Four models are available offering features such

as, Pullcord, Timer, Humidistat/Timer or PIR
versions. All models can be wall; panel or
ceiling mounted and can be connected to either
circular, rectangular or Vent-Axias System 25
flat ducting, which has been specially designed
for concealed applications that can benefit from
its ultra slim 25mm depth.
Cable entry is achieved through a rear entry
grommet on the top right hand side of the unit.
Enclosure of the electrical components is
manufactured from flame retardant grade material.
Supply voltage 220-240V/1/50Hz.

Safety Extra Low Voltage

Fan (SELV)
Designed for areas where a fan has to be fitted
over or within zone 1 in a room containing a
fixed bath or shower according to IEE wiring
regulations (BS 7671), the Solo Plus SELV fan
can be safely installed within the spray area.
The fan is rated IPX7. Control is by mains
safety isolating transformer unit with 24V DC
SELV output, which is sited away from any
source of spray and out of reach of a person
using a fixed bath or shower.
Controller Supply voltage 220-240V/1/50Hz.
Output to fan SELV 24V DC.

42

Models

Performance

The fan should be suitable for flush or surface

mounting, for wall, panel and ducted
applications. The fan should have a 100mm
spigot with integral backdraught shutter
capable of changing its orientation to receive
rear entry or vertical ducting. The fan should
be able to offer constant trickle ventilation
boosted by various integral sensors.

Dimensions (mm)
mm

200
180
160
140
120

261

221

107

54.5

98

64

61
253
208
Solo + SELV Weight 3.3kg

100
80

37

98

70

Front view

60

40
20
0

20

40

60

80

100

120

Volume (m3/h)

The shaded area indicates the variable

speed boost range, adjustable at installation.

The transformer should be safety isolating to

BS EN 60742. The fan should be rated to
IPX7. The fan performance should meet the
Building Regulation (Document F) requirements
of 15 litres a second for bathrooms and 6 l/s
for toilets with a 15 minute timer overrun.

Surface Mount Side view

D

G
F
E

The transformer should be installed either

surface or recess mounted using the supplied
surface mounting box or a plastic two gang
mounting box.
The product should incorporate a 24 volt long
life ball bearing motor. The motor should be
insulated to Class B and fitted with Standard
Thermal Overload Protection (S.T.O.P.) and
designed to operate on SELV 24V DC.

Panel Recess Mount

SOLO PLUS SELV P (Pullcord)

Flush or surface mountable. Control by
pullcord or from light/remote switch. Constant
trickle option. 2 Speed. Adjustable boost.
SELV controller.
Stock Ref. No. 42 74 85

The 100mm circular spigot on the back of the

Solo Plus offers 2-position ducting entries. The
spigot is factory set for rear entry applications,
but can be slid out, turned through 90o and
refitted for vertical ducting installations.

SOLO PLUS SELV T (Timer)

All versions can be installed either as recess

or surface mounted as standard. No other
accessories are required.

Transformer

Flush or surface mountable. Control by room

light switch or other remote switch. 2 Speed.
Constant trickle option. Adjustable boost.
Adjustable timer overrun. Delay on timer. SELV
controller.
Stock Ref. No. 42 74 86

mm

147

88

50

27

SOLO PLUS SELV HT (HumidistatTimer)

Flush or surface mountable. Humidity
controlled auto-variable 2 speed fan. Constant
trickle option. Adjustable boost. Adjustable
timer overrun. Delay on timer. Adjustable
humidity sensor. SELV controller.
Stock Ref. No. 42 74 87

SOLO PLUS SELV TM (Timer/PIR)

Flush or surface mountable. Control by integral
PIR detector. 2 Speed. Constant trickle option.
Adjustable boost. PIR movement sensor. SELV
controller.
Stock Ref. No. 42 74 88

A
C
D

Flush fitted model

Surface mounted model

Washable removable filter

For wiring diagrams see page 224.

Type
Solo
Solo
Solo
Solo

Stock Ref. No.

Plus
Plus
Plus
Plus

SELV
SELV
SELV
SELV

P
T
HT
TM

42 74 85
42 74 86
42 74 87
42 74 88

Extract Performance m3/h (l/s)

High
Med
Trickle
100 (28)
57 (16)
25 (7)
100 (28)
57 (16)
25 (7)
100 (28)
57 (16)
25 (7)
100 (28)
57 (16)
25 (7)

High
29
29
29
29

Tested at 240VAC @ 50Hz

43

Watts
Med
9.3
9.3
9.3
9.3

Trickle
6.9
6.9
6.9
6.9

Sound dB(A) @ 3m
High Speed
Trickle
42.8
23.7
42.8
23.7
42.8
23.7
42.8
23.7

Solo Plus SELV - centrifugal extract bathroom and shower room fan

>

Typical Specification
Supply and Install a Solo Plus SELV (Safety
Extra Low Voltage) Centrifugal fan as supplied
by Vent-Axia Ltd, Fleming Way, Crawley,
West Sussex, RH10 9YX, Telephone: 01293
526062.

Static Pressure (Pa)

Centrifugal Extract Fan

Solo SELV 12
Best Practice

Features and Benefits

>

Suitable for installation over or

within reach of a shower or bath.

>

Built-in washable filter feature.

>

Solo SELV 12 meets the Building

Regulation (Document F)
requirements for domestic
bathrooms and WC's.
IPX7 rated.

>

Transformer complies with

BS EN 60742.

>

Two speed model available.

Safety Extra Low Voltage

The Solo SELV 12 range has been developed specifically for complete safety in the
`splash zone of a bathroom and shower room for those rooms, usually internal, that need
to have the exhaust air ducted some distance to an external discharge point. A single
inlet impeller has been designed for maximum performance and minimum noise levels.
The grille ensures efficient air management and incorporates a filter that can be removed
for cleaning without dismantling the fan.
Suitable for wall, panel and ceiling installations
and windows up to 25mm thick. For high rise or
coastal applications, install through the wall with
a Vent Cowl (Stock Ref No. 56 14 03). With a
powerful SELV motor and proven, high
efficiency centrifugal impeller, Solo SELV 12
can be used with 100mm diameter smooth
bore duct in straight runs equal to 50m, yet still
meets the 54m3/h (15 l/s) required by the
Building Regulations Document F for
ventilation of bathrooms.Solo SELV 12 can also

be used with System 25 flat ducting for shorter

concealed runs that benefit from its ultra slim
25mm depth.
The safety isolating transformer, to BS EN 60742,
is mounted in a purpose made enclosure. The
enclosure can be wall mounted or sited in the
loft. The enclosure will accept mini trunking.

Electrical
Rear 20mm conduit entry for recessed wiring
and side entry grommet for surface wiring.

FAQs Answered
Complete with recessing kit.
Designed for window, wall or ceiling
mounting.

Supply voltage to transformer/controller

220-240V/1/50Hz.
Output to fan 12V SELV/1/50Hz.

Models
SOLO SELV 12

- Safety Extra Low Voltage

fan with airflow shutter and washable filter.
Mains transformer with 12V SELV output.
Stock Ref. No. 111 08 000B

SOLO SELV 12T (Timer)

- SELV fan with

airflow shutter and washable filter. Mains
transformer with 12V SELV output with
presettable overrun timer (5-25 minutes)
Stock Ref. No. 111 08 030B

To meet IEE Regulations, timer models should be

isolated using a 3 pole isolator.
Stock Ref. No. 56 35 18

The maximum length of 2.5mm2 cable

between Transformer and fan is 4.5
metres.

Typical Specification

Transformer 175 90
80

55

F
55

G
60

30

Weight 1.35kg

60

Front view

40

0 10 20 30 40 50 60 70 80 90
Volume (m3/h)

Accessories

Side view
Duct hole diameter
115mm.

Soffit termination set

Stock Ref. No. 56 35 13

the
F)
for
15

Quick fix 100mm wall grille

White Stock Ref. No. 56 35 21
Brown Stock Ref. No. 56 35 41

The motor should be of a shaded pole

induction construction and fitted with ball
bearings. The motor should be insulated to
Class B and fitted with Standard Thermal
Overload Protection (S.T.O.P.) and designed
to operate on SELV 12/1/50Hz.

Window Model

Vent-cowl
Stock Ref. No. 56 14 03

Flexible ducting
Stock Ref. No. 56 36 04 (3metre length)
Stock Ref. No. 56 66 04 (6 metre length)

Window fixing hole 113mm

Transformer

Air replacement grille set

Ivory Stock Ref. No. 56 14 01
Brown Stock Ref. No. 56 14 00

Manufacturers of some fluorescent/low energy

lighting systems indicate that these can interfere
with other electronic/timing circuits. For reliable
operation of these circuits we recommend
therefore that a tungsten filament light is used.

Condensation trap
Filter is easily
removed for cleaning

Stock Ref. No. 56 35 16

For installation details see page 19.

Semi Recessed
installation

Double Airbrick to Circular Duct

Adaptor
Stock Ref. No. 46 91 23

Internal guide
vanes
Plenum

Available with remote sensor.

Rear 20mm conduit entry for recessed
wiring or side grommet for surface
wiring.

Connector

Solo fan

Type
Solo SELV12

Stock
Ref. No.
111 08 000B

Amps
@ 240V
0.26

Max
Watts
39

dB(A)
85m3/h
42

Shutter

Solo SELV12T

111 08 030B

0.26

85

24

41

42

Solo SELV12H

111 08 040B

0.26

Yes

85

24

43

42

Solo SELV 12DP

111 08 020B

Yes

Hi 0.26

85

24

Hi 39

42

Yes

Lo 0.12

45

13

Lo 20

37

Yes

Window fitting kit

Stock Ref. No. 114 61 685A
White wall fitting kit Stock Ref. No. 25 41 02

Extract performance
m3/h
l/s
85
24

Brown wall fitting kit Stock Ref. No. 25 41 00

Flat duct

44

A
B
C
D
E
155 140 36 98 85

20

SOLO SELV 12H (Humidity) - Safety

Extra Low Voltage fan with airflow shutter and
washable filter. Controller. Mains transformer
with 12V SELV output. Remote Ecotronic SELV 12
Humidity sensor with pullcord override included.
Stock Ref. No. 111 08 040B
SOLO SELV 12DP (Two speed) - Two
speed Safety Extra Low Voltage (SELV) fan with
airflow shutter and washable filter. Mains
transformer with 12V SELV output.
Stock Ref. No. 111 08 020B

Fan Dims

100

Supply and install a Solo SELV (Safety Extra

Low Voltage) centrifugal fan, suitable for
window, wall or ducted applications with
integral backdraught shutter and fan running
light as manufactured by Vent-Axia Ltd,
Fleming Way, Crawley, West Sussex,
RH10 9YX, Telephone: 01293 526062.
When installed the fan should comply with
the 16th Edition of IEE Regulations
(BS7671,2001) and on site guide for safety
extra low voltage (SELV) operation. The
transformer should be safety isolating to
BS EN 60742. The fan should be rated
IX57. The fan and controller should be BEAB
Approved.
The fan performance should meet
Building Regulation (Document
requirements of 15 litres a second
bathrooms and 6 l/s for toilets with a
minute timer overrun.

Dimensions (mm)

110

45

Yes

For wiring diagrams see page 221-222.

Solo SELV 12 - Centrifugal extract bathroom and shower room fan

>

Performance

Sensors and auto mode controllers save

energy by only switching the ventilation units
on when needed and when the room is
occupied.

Fan static pressure (Pa)

Centrifugal Extract Fans

Solo Range

Features and Benefits

>

100mm high performance

centrifugal extract fan for internal
bathrooms, WC's and other small
rooms.

>

High performance 85m3/h.

>

Single speed, dual speed and

overrun timer models.

>

Exclusive Variatronic HP2 automatic

humidity control circuitry/variable
speed.
Built-in washable filter feature.

>

PIR version also available.

>

Designed for use with System 25

flat duct (remove spigot).

Performance

Dimensions (mm)

110
mm

100

The fan performance should meet the

Building Regulation (Document F)
requirements of 15 litres a second for
bathrooms and 6 l/s for toilets, (15 minute
timer overrun model for internal rooms).

155

140

36

98

85

55

60

Weight 1.35kg

80

Front view

60
40
20
0

0 10 20 30 40 50 60 70 80 90
Volume (m3/h)

The motor should be of a shaded pole

induction construction and fitted with ball
bearings. The motor should be insulated to
Class B and fitted with Standard Thermal
Overload Protection (S.T.O.P.).

Side view
Duct hole diameter
115mm.

High Performance Ventilation

The Solo range of high performance centrifugal extract fans from Vent-Axia have been
specifically designed for effective ducted ventilation of internal bathrooms, WC's and other
small rooms. Finished in White. The Solo range can be used with 100mm diameter smooth
bore duct in straight runs equal to 50m, yet still meets the 54m3/h (15 l/s) required by
the Building Regulations Document F for ventilation of bathrooms. IP44 Rated.

Vent-Axia Solo DT (Delayed Timer) - A

delayed timer version with 2 minute delay and
5-25 overrun. Control by room light switch or
other remote switch.
Stock Ref. No. 111 01 070A

High air movement capacity and pressure

characteristics are the result of a reliable ball
bearing shaded pole motor and a unique forward
curve impeller developed by Vent-Axia. Detailed
attention to airflow management throughout the
unit ensures efficient running and quiet operation.

Vent-Axia Solo TM2 (Timer/PIR) Control by integral PIR detector. Fan is

switched ON when PIR is triggered. Built-in
overrun timer, variable from 5 to 25 minutes,
switches fan Off.
Stock Ref. No. 111 01 060A

Models are available for surface or recessed

mounting directly into standard 100mm
diameter ducting. Suitable for panel, wall and
ceiling installations and windows up to 25mm
thick. For high rise or coastal applications,
install through the wall with a Vent Cowl (Stock
Ref. No. 56 14 03).

FAQs Answered
Mains unit complete with recessing kit.
Designed for window, wall or ceiling
mounting.
Can be used with System 25 flat or
round duct.
Integral humidistat, timer or PIR versions
available.
Rear 20mm conduit entry for recessed
wiring or side grommet for surface wiring.

Electrical
Rear 20mm conduit entry for recessed wiring or
side entry grommet for surface wiring. Double
insulated appliance.
Enclosure of the electrical components
manufactured from flame retardant grade
material. Supply voltage 220-240V/1/50Hz.

Models
Vent-Axia Solo P (Pullcord) - Single speed
85m 3/h. Control by pullcord or from light/
remote switch or sensor.
Stock Ref. No. 111 01 010A
Vent-Axia Solo DP (Two speed) - Dual
speed. Continuous low speed 60m3/h running
for permanent 'trickle' ventilation. High speed
85m3/h override facility by pullcord, room light
or other remote switch. Alternatively, at time of
installation Solo can be set to run at low speed
operated by the room light switch.
Stock Ref. No. 111 01 020A
Vent-Axia Solo T (Timer)

- Single speed
85m /h. Control by room light switch or other
remote switch. Overrun timer variable from 5 to
25 minutes.
Stock Ref. No. 111 01 030A
3

46

Remove spigot if used with System 25

Window Model

Semi-recessed model

Vent-Axia Solo HP2 (Humidity

sensing) - Humidity controlled auto-variable
speed fan. Variatronic circuitry automatically
varies the extract rate according to the humidity
level thus ensuring minimum energy usage and
low sound levels. The fan switches On to low
speed when humidity reaches the set level and
increases in speed as moisture level rises
towards saturation. High speed override by
pullcord, room light or other remote switch.
Humidity adjustment 62-82% RH.
Stock Ref. No. 111 01 040A

Vent-Axia Solo HT (Humidistat- timer) Humidity controlled auto-variable speed fan.

Automatically varies the extract rate according
to the humidity level thus ensuring minimum
energy usage and low sound levels. The fan
switches On to low speed when humidity
reaches approx. 70% RH and increases in
speed as the moisture level rises to saturation.
Overrun timer variable from 5 to 25 minutes.
When the light is switched On, the fan switches
from auto humidity control to full speed. When
the light is switched Off, the fan will continue to
run for the pre-set period and then revert to auto
humidity control.
Stock Ref. No. 111 01 050A

Window fixing hole 113mm

To meet IEE Regulations, timer models should

be isolated using a 3 pole isolator.
Stock Ref. No. 56 35 18

Washable removable filter

115mm hole is drilled

with a core cutter when
using a wall fitting kit.

Telescopic wall liner is

fitted

Type

Stock
Ref. No.

Amps
@ 240V

Solo P

111 01 010A

0.15

Extract performance
m3/h
l/s
85

24

Solo DP

111 01 020A

0.15

60/85

Solo T

111 01 030A

0.15

85

Solo DT

111 01 070A

0.15

85

Solo TM2

111 01 060A

0.15

85

24

35

42

Yes

Solo HP2

111 01 040A

0.15

30-60/85

8-17/24

35

42

Yes

Solo HT

111 01 050A

0.15

60-85

17-24

35

42

Yes

Window fitting kit Stock Ref. No. 114 61 685A

White wall fitting kit Stock Ref. No. 25 41 02

Max
Watts

dB(A)
85m3/h

Shutter

35

42

Yes

17/24

35

42/27

Yes

24

35

42

Yes

24

35

42

Yes

Brown wall fitting kit Stock Ref. No. 25 41 00

47

Manufacturers of some fluorescent/low energy

lighting systems indicate that these can
interfere with other electronic/timing circuits.
For reliable operation of these circuits we
recommend therefore that a tungsten filament
light is used.

For wiring diagrams, see page 220.

Solo Range - centrifugal extract bathroom and WC fans

>

Typical Specification
Supply and Install a Solo Centrifugal fan
suitable for window, wall or ducted
applications with integral backdraught shutter
as manufactured by Vent-Axia Ltd, Fleming
Way, Crawley, West Sussex, RH10 9YX,
Telephone: 01293 526062.

Fan static pressure (Pa)

Centrifugal Extract Fans

System 25
Features and Benefits
>

High grade, non-corrodible PVC.

>

Lightweight and non-reverberant.

>

2.4m length ducting can be easily

cut to size as required.

>

>

>

Easy to install using connectors with

push-fit seals and specially
designed profiled bends.
PVC flat ducting ideal for new
building and refurbishment
installation.
Integral guide vanes for high
efficiency air movement.

Solo & Solo Plus for

use with System 25
System 25 flat ducting has been specifically
designed to be used in conjunction with a
version of the Solo and the new Solo Plus fan
ranges.
For further details see page 38-47.

System 25 is specifically designed for

concealed installation between the concrete
slab and the plasterboard ceiling of the dwelling
below. Fire shutters are not normally necessary
when the ducting system is contained within one
fire compartment. Where System 25 passes
through a fire wall, special System 25 duct
closers are available.

Components

100mm to System 25 Adaptor

Moulded, with built-in guide vanes.
Stock Ref. No. 46 21 94

System 25 Straight Duct

Available in 2.4m lengths with built-in guide
vanes. 215 x 25mm.
Stock Ref. No. 46 21 89

System 25 components are simply pushed

together using moulded connectors with integral
'push-fit' seals which eliminate the need for
sealants or tape. Unsightly marks associated with
sheet metal systems are therefore prevented.

System 25 offers many advantages over

traditional sheet metal flat ducting being less than
half the weight, non-corrodible, non-reverberant
and easy to cut with a conventional saw.

FAQs Answered
When using System 25 with Solo
remove the shutter flap and cut off the
100mm spigot.
Can be connected directly to 100mm
round ducting.
Internal guide vanes reduce system loss
and contribute to its strength and rigidity.
Easy installation within a 30mm space.
An optional intumescent duct closer
crushes and seals the duct in the event
of fire.

System 25 Intumescent Duct Closer

System 25 Connector
Used to connect all System 25
components. Features push-fit seals to eliminate
the need for sealant or tape.
Stock Ref. No. 46 30 23

System 25 Mounting Strap

Used to connect a System 25 Solo fan to the

system.
Stock Ref. No. 46 22 00

Powder coated steel clip designed for all forms

of fixing systems.
Stock Ref. No. 46 21 98
A-223mm
B- 70mm
C- 77mm
D-250mm
E-215mm

Fast easy installation

System 25 ducting is fixed to ceilings using steel
mounting straps anchored by cartridge masonry
nails or screws and nails utilising plastic plugs.
The mounting straps clip simply onto the ducting
and are pierced ready for fixing.

System 25 Plenum Spigot Adaptor to

100mm diameter
Stock Ref No. 46 69 77

System 25 Airbrick Adaptor

Fabricated adaptor.
Stock Ref. No. 46 22 02

A-290mm
B- 75mm
C-215mm

A-214mm
B- 62mm
C- 57mm

System 25 Airbrick
Free area 4645mm
Blue/Black
Stock Ref. No. 46 66 35
Rustic Red
Stock Ref. No. 46 66 37
Terracotta
Stock Ref. No. 46 66 36
Rustic Brown
Stock Ref. No. 46 66 39
Buff Sand
Stock Ref. No. 46 66 38
2

System 25 Horizontal 90 Bend

Moulded, with built-in guide vanes.
Stock Ref. No. 46 21 96

A-250mm

Used to connect system 25 flat ducting to

100mm dia. circular duct.
Stock Ref. No. 42 54 97

System 25 Vertical 90 Bend

System 25 Plenum

The range includes all the bends, adaptors,

plenums and accessories necessary for a
complete installation. When using Solo fans
with System 25 flat ducting remove the shutter
flap and cut off the 100mm spigot flush with the
rear of the Solo fan.

Moulded, with built-in guide vanes.

Stock Ref. No. 46 21 95

Used to connect single airbrick to 100mm

diameter circular duct.
Stock Ref. No. 46 66 81

Simply wrapped around the duct wherever a

fire compartment wall or floor is breached. 2
hour fire resistance is provided, independently
tested to BS 476 Part 20, 1987. In the event
of fire the intumescent material expands to
crush the duct as it softens, sealing the void
against heat, flame and smoke.
Stock Ref. No. 46 77 90

Performance
The extract performance of a System 25
installation can be calculated using the
performance table.
11
10
9
8
7
6
5
4
3
2
1
0

50

60 70 80 90 100
Air Flow (m3/h)

Component

The high performance of

System 25 is derived from
internal guide-vanes within
each component. Specifically
designed to reduce system
loss due to turbulence and
channel airflow effectively,
the guide-vanes also
contribute to strength and
rigidity. To further optimize
airflow, all 90 horizontal
and vertical bends, air
brick, wall terminals and
connectors are carefully
designed and profiled for
maximum effectiveness.

48

Unique airflow design

A-216mm
B- 76mm
C- 57mm

Internal guide
vanes

Plenum

Connector

90 Horizontal Bend

1.33

90 Vertical Bend

1.41

Airbrick Adaptor

0.82

Designed for upright use.

Free area 6210mm2
Terracotta
Stock Ref No. 46 87 28
Buff Sand
Stock Ref No. 46 87 29
Rustic Brown
Stock Ref. No. 46 87 30

Plenum
Example:
2 - 2.4m lengths of duct
2 - 90 Horizontal bends
1 - Airbrick Adaptor
1 - Plenum
Total equivalent duct length
From the graph the maximum
performance will be 54m3/h (15 l/s).

Flat duct

49

1.0
1.79

45 Horizontal Bend

System 25 Soldier Course Air Brick

Solo fan

Equivalent
duct length(m)

1m Duct

m
4.80
3.58
0.82
9.2

System 25 - PVC flat ducting

For use with Solo Fans

100mm to Single Airbrick Adaptor

System 25 Horizontal 45 Bend

A- 80mm
B-215mm

A-107.5mm
B- 215mm
C-240mm

System 25 is a lightweight high efficiency flat ducting ventilation system for use in residential building applications where limited space is
available for exhaust ducts from individual flats. System 25 flat ducting and components are manufactured in high quality PVC, are
simple to install and provide effective and compatible ducting for the Solo Range of fans for residential applications.

A-305mm
A-218mm
B-215mm

Equivalent duct length

From open end of Plenum (m)

PVC Flat Ducting

New Duet Range

>

Designed to meet Local Authority

run and standby specifications.

>

Complies with Building Regulation

(Document F) requirements.

>

Now with boost running facility.

>

Run and standby facility.

>

Self diagnostic check of controls.

>

Overrun timer as standard, remote

PIRs or humidistat can be installed.

The fan performance should meet building

regulations of 30 l/s suitable for bathrooms or
utility rooms.

100

For full details of System 50 components see

page 59.

80

Dimensions (mm)
Surface

35

347

170

224 69

99

Recessed 385

233

366 255

98 230

Duct

233

230 36

98

366

60
40
20

35

20

40

60

80 100 120 140

Volume (m 3/h)

Accessories

Duet Surface

Additional 50mm
inlets if required

Cover removable
for access

Quiet operation.

Performance

System 50 Duct
Components

Duet Range - twin Run and standby kitchen/utility room fans

>

Typical Specification
Supply and install a Duet run and standby
fan suitable for mounting in wall, ceiling or
ducted applications as manufactured by
Vent-Axia Ltd, Fleming Way, Crawley,
West Sussex, RH10 9YX, Telephone:
01293 526062.

Static Pr essur e (Pa)

Features and Benefits

Run and standby fans

Ultra quiet ventilation

FAQs Answered
Can be ceiling mounted.
Can be used with System 50 flat duct.
The Duet Duct model includes a remote
indicator.
Duty sharing fans, automatic changeover.
Built-in or remote LED indicator for fan
running and fan failure.

Ivory Stock Ref. No. 56 14 01

Brown Stock Ref. No. 56 14 00

Built-in Controls
Adjustable Timer from 5-25 minutes, to comply
with Building Regulations, Document F. 24
hour automatic duty share changeover. Any
external electro-mechanical switch can be used
eg. ThermoSwitch, HumidiSwitch.
Double insulated appliance.
Supply voltage 220-240V/1/50Hz.

Controller
Optional Remote indicator
The remote fan indicator unit provides fan status
information at a convenient position remote from
the main unit. (Included as standard with Duct
Model).
Stock Ref. No.18 00 10C

50

Quick fix 100mm wall grille

White Stock Ref. No. 56 35 21
Brown Stock Ref. No. 56 35 41

Outlet can be side,

top or bottom

Duet Duct

Cover removable
for access

Duet Duct
Sheet metal construction. Up to 2 inlets can be
connected. 100mm discharge spigots. A
remote indicator is included with this model.
Stock Ref No. 18 07 10C

Vent-cowl for connection to 100mm

rigid pipe

Stock Ref. No. 56 14 03

Remote Indicator
The remote fan indicator unit provides fan status
information at a convenient position remote
from the main unit.
Stock Ref. No. 18 00 10C

25

100mm Flexible ducting.

Stock Ref. No. 56 36 04 (3 metre)
Stock Ref. No. 56 66 04 (6 metre)

95

Wall Fitting Kit

For use with Duet range. Hole size 115mm.
Stock Ref. No.
25 41 02 - White
25 41 00 - Brown

Additional 50mm
spigot in any 3 sides

The housing and fan scroll are manufactured

from high quality polymeric materials. The
control circuitry is mounted within its own
enclosure and the unit is rated IP44.

Front inlet
grille

The motors are manufactured with long life self

aligning sleeve bearings, impedance protected.
Insulation is to Class H.

Flush-mounted model with 100mm discharge

spigot. Two flush-mounted washable filter
panels, Fan 1/Fan 2 running indicators, fault
indicator.
Stock Ref. No. 18 06 10C

Cover removable
for access

Duet Recessed

Motor

Outlet

Air replacement grille set

Condensation trap for 100mm rigid duct

Stock Ref. No. 56 35 16

For wiring diagrams see page 226.

Manufacturers of some fluorescent/low energy lighting
systems indicate that these can interfere with other
electronic/timing circuits. For reliable operation of these
circuits we recommend therefore that a tungsten filament
light is used.

Type

49

Duet is suitable for use with either 100mm

diameter ducting or System 50 PVCu ducting,
for installations that need concealed ducting,
with a minimal ceiling void of only 90mm
required. System 50 also combines the
advantages of being non-corrodible and nonreverberant with easy installation.

Requires 100mm circular hole in wall. Fan

1/ Fan 2 running indicators, fault indicator.
Stock Ref. No.18 05 10C

99

Duet features include a backdraught shutter, LED

indicators showing the status of the unit, self
diagnostic check of controls before the fan will
start, run and standby facility, 5-25 minute run
on timer and 24 hour auto fan changeover.
Suitable for ambient temperatures of up to
+40C, built-in dust filters.

Duet Recessed

Models
Duet Surface

Duet is a range of run and standby fans designed to provide extraction levels that comply
with Building regulations (Document F) for bathrooms and WC's and incorporates a
run on timer. All models offer automatic changeover on fan failure.Ultra quiet and
particularly suitable for areas where unobtrusive sound levels are essential, Duet is
available for surface, recessed or duct mounting. IP44 rated. Duet meets the requirement
of Health Technical Memorandum 2025, foul extract ventilation systems 2.8. Ideal for
new build and refurbishment installations.

Inlet

Outlet

White Stock Ref. No. 25 41 02

Brown Stock Ref. No. 25 41 00

Wall fitting kit

Stock
Ref. No.

Dual sized spigots to

give either 50mm or
100mm standard pipe

Remote
Indicator
Stock Ref. No.

Amps
240V
0.25

Extract
Performance
m3/h
l/s
122

Watts

Surface

18 05 10C

+ 18 00 10C

33

Recessed

18 06 10C

+ 18 00 10C

0.25

122

33

35

Duct

18 07 10C

Included

0.25

122

33

35

Single fan only performance

51

35

dB(A)
@ 3m
Both fans running
One fan running
Both fans running
One fan running
Both fans running
One fan running

37
34
36
33
36
33

New
Kitchen & Utility Room fans

Features and Benefits

>

Long life LoWatt motor lasts 5 times

longer than conventional motors.

>

Up to 80% energy saving.

>

Meets current building regulations

when installed.

> Unique patented instant electric

opening shutter with positive closure.
>

>

Low sound levels.

keymark certified.

> 5 Year Guarantee.

Long Life Ventilation

Shutters

Installation
The range is suitable for installation in panels,
walls or windows using the kits available. LoWatt
fans are quick and simple to fit using reversible
grommets and easy-wire terminals, and are
suitable for wall or ceiling mounting at any angle.
150mm telescopic wall kits are available with a
white or brown outside grille. The kit is supplied
with a telescopic wall sleeve to fit walls
225360mm thick.
Window fitting kits are available for use with all
LoWatt 150mm models through single or
double glazed windows up to 40mm thick.

FAQs Answered
LoWatt fans are suitable for installation
in windows, walls, panels or ceilings.

The range meets the requirements of the

current Building Regulations Document F for
the ventilation of utility rooms 30l/s and for
kitchens 60l/s.

LoWatt fans can be installed at any

angle.

Kitchen and Utility models

LoWatt U/KP (Shutter/Pullcord) - Ultra
long life DC energy saving motor. Patented
instant electric opening shutter. Controlled
with integral power supply with pullcord
On/Off switch.
Stock Ref No. 45 91 23

The electronically controlled motor is fitted with

long life ball bearings to provide an
expected 50,000 hour running life and a
Standard Thermal Overload Protection
(S.T.O.P.). The motor should be insulated to
Class III (-25C to +40C) and is to conform
to BS EN 60335-2-80.

150mm Wall Kit White - 14 09 02A

150mm Wall Kit Brown - 14 09 03A

150mm Window Kit White - 14 09 01A

Fitted with instant automatic shutter.

A mains PIR sensor is available

G H

Weight 1.2kg

LoWatt Kitchen/Utility

Easy wire terminals, for simple installation,

offers the choice of either kitchen or utility
room performance.

NOTE: The Transformer is an integral part of

the fan which MUST NOT be installed as a
SELV product.

Panel fixing hole 152mm

Wall fixing hole 152mm
Window fixing hole 152mm

For Wiring Diagrams see pages 220.

Performance
Output is for the extract airflow, dependant on setting.
Model

Stock Ref

Description

UTILITY SETTING
LoWatt U/KP
LoWatt U/KT

Watts

m3/h

l/s

dB(A) @ 3m

45 91 23
45 91 24

axial/pullcord
axial/timer

7.5
7.5

160
160

46
46

33
33

LoWatt U/KH
KITCHEN SETTING

45 91 25

axial/humidistat

7.5

160

46

33

LoWatt U/KP
LoWatt U/KT

45 91 23
45 91 24

axial/pullcord
axial/timer

11.5
11.5

230
230

64
64

36
36

LoWatt U/KH

45 91 25

axial/humidistat

11.5

230

64

36

WALL KIT 14 09 02A (White)

14 09 03A (Brown)

WINDOW KIT 14 09 01A (White)

52

C D E

LoWatt U/KH (Shutter/Humidistat) Ultra long life DC energy saving motor.

Patented instant electric opening shutter.
Controlled with integral power supply
with pullcord override switch and adjustable
humidity sensor (60-95% RH).
Stock Ref No. 45 91 25

Window Kit

On board power supply for easy

installation.

The fan is to be wall mounted using a wall kit

14 09 02A (white) or 14 09 03A (Brown),
or window mounted using a window kit
14 09 01A (white).

LoWatt U/KT (Shutter/Timer) - Ultra long

life DC energy saving motor. Patented instant
electric opening shutter. Controlled with integral
power supply with electronic adjustable overrun
timer (5-25 minutes).
Stock Ref. No. 45 91 24

Wall Kits

Kitchen/Utility 216 224 80 146 60 55 104 152

The fan should be double insulated to meet

IEE regulations and meet the Building
Regulation (Document F) requirements of 30
litres a second for utilities and 60 litres a
second for kitchens.

Operation via pullcord, external switch with

overrun timer or humidity control/pullcord.

Vent-Axia LoWatt fans feature LoWatt long life DC energy saving motors that last 5 times
longer than conventional motors, whilst delivering up to 80% energy savings. The
extended life of LoWatt fans is due to the use of a new generation of high quality
electronically controlled ball-bearing motors especially developed for this range. The
motors are perfectly designed for the wet conditions of utility rooms and kitchens,
extracting stale, moisture-laden air quietly and efficiently.

Vent-Axia LoWatt fans have instant shutters using

patented Integral Magnetronic Control (IMC)
technology ensuring that the fan is only open to
the outside world when it is working - with no
extra power used to operate the shutter. This
means that the only air to escape is the air
extracted. When the fan stops the shutter closes
firmly, until the fan operates again.

Supply and install a LoWatt fan with integral

magnetronic shutter (IMC) and removable
grille as manufactured by Vent-Axia Ltd,
Fleming Way, Crawley, West Sussex RH10
9YX, Telephone: 01293 526062. The fan
case and grille shall be made from ABS
plastic and have an axial impeller.

Dimensions (mm)

For even more energy efficiency the Vent-Axia

LoWatt range is available with Integral Timer
or integral Humidity Sensor. Remote PIR
sensors are available which operate the fan
only when required.

53

LoWatt - Energy Saving Ventilation - kitchen/utility room fan

>

IP44 rated.

Intelligent Controls

Typical Specification
LoWatt U/KP, U/KT, U/KH

Silhouette 150
Stylish ultra low profile grille.

>

Downstream airflow guide vanes for

improved pressure development.

>

Ball bearing motors for vertical or

horizontal application.

>

Wall kit design ensures installed

performance to meet Building
Regulation Document F requirements.

>

DEMKO Approved.

Silhouette A

40

30

The fan performance should meet the

Building Regulations (Document F)
Requirements 60 l/s for kitchens (30 minute
timer overrun model for internal WCs). The
profile should be no more than19mm thick.

Models

240V versions only.

Electrical backdraught shutter

Silhouette 150X - Single speed 150mm

kitchen fan with neon running light and electric
backdraught shutter.
Stock Ref. No. 45 40 59

The motor should be a ball bearing motor for

installation at any angle and fitted with
Standard Thermal Overload Protection
(S.T.O.P.). The fan should be DEMKO
Approved.

60

120 180

240

300

Volume m /h

150mm Wall model

Fixing hole diameter 160mm

(when wall kit used)

Ivory Stock Ref. No. 56 14 01

Brown Stock Ref. No. 56 14 00

150mm Wall Fitting Kits

Stock Ref. No. 45 08 73 - White
Stock Ref. No. 45 46 01 - Brown

Stock
Ref. No.

Timer
30 mins

Humidistat
60-90%RH

m3/hFID

l/s

Performance
Watts
dB(A) @ 3m

For utility rooms and kitchens

Silhouette 150X

45 40 59

Silhouette 150XT

45 40 60

Yes

Silhouette 150XH

45 40 61

Yes

360

Air replacement grille set

Type

Silhouette 150XH - Single speed 150mm

with integral adjustable auto humidity sensor
from 60-90% RH, adjustable overrun timer (up
to 20 mins) neon running light and electric
backdraught shutter.
Stock Ref. No. 45 40 61

If ceiling mounted 3m max. of ducting

should be used with a condensation
trap.

Can be installed at any angle.

Yes

280

78

35

47

280

78

35

47

280

78

35

47

For Wiring Diagrams see pages 236.

54

10

Silhouette 150XT - Single speed 150mm

kitchen fan with integral adjustable electronic
overrun timer (up to 30 mins), neon running
light and electric backdraught shutter.
Stock Ref. No. 45 40 60

Integral humidity, timer and PIR controls.

20

Slim profile only 19mm. FID performance

of 280m 3 /h, double insulated. Power
consumption only 35 watts.

FAQs Answered

Silhouette 150

Silhouette 150mm models

19mm actual profile

150mm 200 152 148 51 104 129 220 37

Weight 150mm 1.75kg

55

Silhouette 150 - mains kitchen/utility room fan

The Silhouette range is designed for modern living. With a profile of only 19mm on the kitchen models, Silhouette blends in with the wall
surface to provide an unobtrusive installation. Careful design means a white sound spectrum understates the dB(A) sound levels
providing optimised sound to performance output.

Suitable for wall and panel mounting

only.

Dimensions (mm)

Accessories

Slimline Kitchen Ventilation

Mounted in the centre of the fan, beneath the
ultra slim profile grille, are the electronics,
incorporating a choice of integral control, a PIR
movement sensor to activate the product when
a person enters a kitchen or Utility room, a
humidistat for detecting a change in internal
humidity or an overrun timer option that is
adjustable between 5 and 30 mins. Silhouette
can be ceiling/panel mounted and connected
to an appropriate duct run to the outside.

Performance
Silhouette 150

>

Typical Specification
Supply and install a Silhouette axial fan for
installations in walls or ceilings, with electric
backdraught shutter on the 150mm version
as supplied by Vent-Axia Ltd, Fleming Way,
Crawley, West Sussex, RH10 9YX
Telephone: 01293 526062.

Features and Benefits

Static Pressure (Pa)

Mains Kitchen & Utility

Room Fans

Centrif Range
Typical Specification

Features and Benefits

>

100mm circular spigot for speedy

installation.

>

Safety isolating interlock device.

>

Complies with Building Regulation

(Document F) requirements for
extraction levels in kitchens, utility
rooms and bathrooms.

>

The fan performance should meet the Building

Regulation (Document F) requirements of 60
litres a second for kitchens and 30 litres a
second for utility rooms.
The motor should be manufactured with
greased-for-life sleeve bearings allowing the
fan to be installed at any angle. It shall be
double insulated to meet the IEE wiring
regulations. The motor should be insulated to
Class B.

Centrif 170T (Timer)

- Single speed with

adjustable overrun electro timer, 5-20 mins.
Stock Ref. No 25 52 10A

Centrif 170DP (Two Speed)

Wall fitting kit

- Two

Quick fix 100mm wall grille

Centrif 170HP - (Humidity)

White Stock Ref. No. 56 35 21

Brown Stock Ref. No. 56 35 41

- Single speed kitchen extract

300
Telescopic wall
liner is fitted
200

speed and Off with pullcord switch.

Stock Ref. No 25 53 10A
- Auto
humidity sensing low fan speed with pullcord or
remote switch, high speed override.
Stock Ref. No 25 54 10A

400

White Stock Ref No. 25 41 02

Brown Stock Ref. No. 25 41 00

EE

Complete with spring operated

backdraught shutter.

Centrif 170 - Single speed extract fan.

Stock Ref. No 25 51 10A

Centrif 250T (Timer) - Single speed with

adjustable electro timer 5-20 minutes.
Stock Ref. No 25 62 20A

Motor
The external rotor motor features greased-for-life
sleeve bearings which allow the fan to be
installed at any angle. Insulation is Class B.
Double insulated appliance. Supply voltage
220-240V/1/50Hz.

115mm hole is
drilled with a
core cutter

100

EE D

Dual speed model available.

100mm Flexible ducting

Stock Ref No. 56 36 04 (3 metre)
Stock Ref No. 56 66 04 (6 metre)

Centrif 250DP (Two Speed) - Two

speed and Off with pullcord or remote switch.
Stock Ref. No 25 63 20A
Centrif 250HP (Humidity) - Auto humidity

90

180

To meet IEE Regulations, timer models should

be isolated using a 3 pole isolator.
Stock Ref. No. 56 35 18

270

VOLUME (m3/h)

For Wiring Diagrams see page 236.

Soffit termination set.

Stock Ref. No. 56 35 13

Vent Cowl for connection to 100mm

rigid pipe
Stock Ref No. 56 14 03

sensing low fan speed with pullcord or remote

switch, high speed override.
Stock Ref. No 25 64 20A

Condensation trap for 100mm rigid

duct
Stock Ref. No. 56 35 16

High speed
Extract Performance
m3/h
l/s

Amps
@ 240V

Watts

dB(A)
@ 3m
High

47

0.5

70

37

47

0.5

70

37

170

47

0.5

70

37

33

25 54 10A

170

47

0.5

70

37

33

White

25 61 20B

225

62

0.9

130

43

Centrif 250T

White

25 62 20A

225

62

0.9

130

43

Centrif 250DP

White

25 63 20A

225

62

0.9

130

43

33

Centrif 250HP

White

25 64 20A

225

62

0.9

130

43

33

Type

Colour

Stock
Ref. No.

Centrif 170

White

25 51 10A

170

Centrif 170T

White

25 52 10A

170

Centrif 170DP

White

25 53 10A

Centrif 170HP

White

Centrif 250

dB(A)
@ 3m
Low

Manufacturers of some fluorescent/low energy lighting systems indicate that these can interfere with other electronic/timing circuits.
For reliable operation of these circuits we recommend therefore that a tungsten filament light is used.

For installation details see page 19.

56

270

Centrif 250

fan.
Stock Ref. No 25 61 20B

Centrif 250 models are fitted with a metal

washable filter fixed on the inside of the grille
which can be easily removed. A safety interlock
device isolates the fan when the grille is
removed for added mechanical safety.

180

SP

Fitted with interlock to cut power when

grille is removed.

90

SP

Can be used with flat or round duct.

Spare Filter for Centrif 250.

Stock Ref. No. 45 10 17

Accessories
Models

Centrif 250

FAQs Answered
Designed for wall and ceiling mounting.

20

W
LO

The Centrif has a 100mm circular spigot.

Speedy installation is achieved using a core
cutter. The spigot also encloses a built-in, spring
operated backdraught shutter. The Centrif
Range can be wall mounted using a telescopic
wall fitting kit available as an accessory
(requires a 115mm diameter hole). For ceiling
applications the range is ducted either through

40

GH

All models feature an easy to remove grille

secured by integral spring release catches.

60

VOLUME (m3/h)

STATIC PRESSURE (Pa)

Easy cleaning

98 57

HI

Fast installation

a soffit outlet or roof cowl assembly. There is

convenient access for wiring which can be
surface or recessed.

Timer model for internal rooms.

Kitchen & Utility Ventilation

The Centrif 250 is for kitchens and the Centrif

170 for utility rooms and large bathrooms.
Surface mounting directly into standard 100mm
diameter ducting, through the wall or ceiling
installation. IPX4 rated.

80

The fan should be BEAB approved.

The Centrif range is a series of 100mm centrifugal extract fans for the domestic
environment. Available in two models, Centrif 170 & 250. The range is designed to
provide extraction levels that comply with Building Regulation (Document F)
requirements, with special humidity sensing variants for local authority use.

28 79

57

Centrif Range - centrifugal kitchen/utility room fans

Removable grille assembly for easy

cleaning.

ED

>

H S PE

Removable filter for easy cleaning

on Centrif 250.

Centrif 170
275 245 117
Centrif 250
Weight 3.1kg

SPEED

>

Dimensions (mm)

HI G

Humidity sensing model for local

authority use.

Performance
Centrif 170

L OW

>

Supply and install a Centrif Centrifugal fan

suitable for mounting in walls and ducted
applications with backdraught shutter and a
safety interlock grille which isolates the fan
when the grille is removed as supplied by
Vent-Axia, Fleming Way, Crawley,
West Sussex, RH10 9YX, Telephone:
01293 526062.

STATIC PRESSURE (Pa)

Centrifugal kitchen and

utility room fans

System 50

>

Ideal for new building and

refurbishment installation.

>

High grade, non-corrodible PVC.

>

Lightweight and non-reverberant.

>

Easy to install using design

moulded components with push-fit
connections.

A-222mm
B- 59mm
C- 50mm
D-283mm

System 50 Mounting Strap

Powder coated steel clip designed for all forms
of fixing systems.
Stock Ref. No. 46 67 57
A- 220mm
B- 55mm
C- 1500mm

System 50 Straight Duct

Available in 1.5m lengths. 220 x 55mm.
Stock Ref. No. 46 68 44
A-226mm
B- 59mm
C- 162mm
D- 86mm
E-100/125mm

System 50 90 Spigot Connector

A-226mm
B- 59mm
C-259mm
D-100/125mm
E- 50mm

Used to connect flat ducting to round ducting.

Spigot 100/125mm.
Stock Ref. No. 46 68 46

The range includes all the bends, adaptors and

accessories necessary for an effective, complete
exhaust duct system.

A- 135mm
B- 222mm

System 50 Vertical 90 Bend

With integral moulded socket end.
Stock Ref. No. 46 68 48

Straight Duct

Vertical
90 Bend

System 50 Airbrick

Stock Ref. No. 46 68 49

A-226mm
B- 59mm
C- 53mm

System 50 Connector

Free area 12580mm2

Blue Black
Stock Ref. No. 46 68 07
Terracotta
Stock Ref. No. 46 68 08
Rustic Red
Stock Ref. No. 46 68 09
Buff Sand
Stock Ref. No. 46 68 10
Rustic Brown
Stock Ref. No. 46 68 11

Used to connect straight ducting.

Stock Ref. No. 46 68 50
A-130mm
B- 80mm
C- 16mm
D-100mm

A- 290mm
B- 305mm
C- 90mm

Centrif System 50 Plenum

Stock Ref. No. 46 81 00

System 50 Reducer Cone

Reduces round diameter from
125mm - 100mm.
Stock Ref No. 46 68 51

Performance
The extract performance of a System 50
installation can be calculated using the
performance table.

System 50 Tee Piece

With integral moulded socket end.
Stock Ref. No. 42 87 99

18
16

System 50 Horizontal 90 Bend

With integral moulded socket end.
Stock Ref. No. 46 68 47

FAQs Answered
Can be connected directly to 100mm or
125mm round duct.

A-215mm
B-138mm
C- 58mm

Equivalent duct length from open end

of Plenum or Spigot Adaptor (m)

Airbrick Adaptor

Stock Ref. No. 46 68 17

System 50 Soffit Grille

With integral moulded socket end.

Stock Ref. No. 42 75 98
A-226mm
B- 59mm
C-275mm

System 50 Airbrick Adaptor

A-245mm
B- 79mm
C- 50mm
D- 60mm

System 50 Horizontal 45 Bend

Straight ducts are joined using push-fit

connectors and are fixed to ceilings using steel
mounting straps anchored by cartridges,
masonry nails or screws using plastic plugs.

A-220mm
B-144mm
C-160mm
D-121mm
E- 39mm
F- 28mm
G- 25mm

A-226mm
B- 59mm
C-105mm
D- 59mm

System 50 Horizontal Connector

Complete Exhaust Duct

System

System 50 Intumescent Duct Closer

2 hour fire resistance provided, independently
tested to BS476 Part 20, 1987.
Stock Ref. No. 46 77 91

System 50 installation with ACM 125 Mixed Flow fan

Horizontal 90 Bend

14
12
10
8
6
4
2

Ideal for many domestic or commercial

fans.

50
54

100

150

200
250
216

Air Flow (m /h)

Easy installation within a 60mm space.

Airbrick

Component

Intumescent duct closer crushes and

seals the duct in the event of fire.

System 50 installation using a Centrif fan

58

Spigot
connection

System 50 installation with Vent-Axia

extractor hoods.

59

1m Duct
90 Horizontal Bend
90 Vertical Bend
Air Grille
Plenum
Airbrick Adaptor

Equivalent
duct length (m)
1.0
1.79
1.41
1.78
0.82

System 50 PVC flat ducting

PVC Flat Ducting

The System 50 spigot connector will accept

Vent-Axia's Centrif range or the extractor hood
range. System 50 ducting is only 55mm deep
and is specifically designed for concealed
installation between the floor and ceiling or on

Used to connect double air brick to 100, 125

or 150mm diameter round ducting.
Stock Ref. No. 46 91 23

Used to connect Centrif or Vent-Axia Extractor

hoods to the system. Spigot 125/100mm.
Stock Ref. No. 46 68 45

System 50 is a lightweight flat ducting ventilation system for use in residential building applications where limited space is available for
exhaust ducts. Simple to install, System 50 provides effective and compatible ducting for the Solo, Duet and Centrif ranges, ACM 100,
ACM 125 mixed flow duct models and Vent-Axia extractor hoods.
System 50 offers many advantages over
traditional sheet metal flat ducting being
less than half the weight, non-corrodible,
non-reverberant and easy to cut with a
conventional saw.

Double Airbrick to Circular Duct

Adaptor

ACM 125

A fully integrated, flat duct system

for use with Solo, ACM125,
Centrif, Duet units, Vent-Axia
extractor hoods and100mm/
125mm dia. mixed flow duct
models.

Centrif 250

>

A- 217x140mm
B- 20mm
C- 137mm
D- 25mm
E- 99mm
F- 124mm
G- 149mm

Components

Centrif 170

Features and Benefits

Duet &
Solo 100

PVC flat ducting

New VA140/VA150 Range

>

Two performances to suit kitchen or

utility rooms.

>

Meets Building Regulations when

installed.

10

The motor should be manufactured with ball

bearings and be fitted with Standard Thermal
Overload Protection (S.T.O.P.). The motor
should be insulated to Class B.

50

100

150

200

250

VOLUME (m3/h)

Wall fixing hole 152mm

VA150A & VA150P Window model

G

VA150X, T, H & HT Window Models

*H DIA.

VA150 Window and Wall models and VA140 Panel models are designed to alleviate the everyday problems that condensation and
household odours may cause. Effectively extracts odours and moisture laden air from kitchen (K) and utility (U) rooms giving a healthy and
fresh environment.

C
C

Wall Model

The fan should be BEAB Approved.

Kitchen and utility room ventilation

E
E

Panel fixing hole 152mm

A
A

Shutter
The louvred shutter on the VA140/150 is
thermo-electrically operated and is concealed
behind the interior grille. Operates automatically
when the fan is switched On. Trickle vent facility
available on all models.

Control
P models are fitted with an On/Off pullcord
which actuates both shutter and fan. Control can
be via a remote On/Off switch or through the
lighting circuit, as required.
Timer models are fitted with an electronic timer
which provides the necessary 15 minute overrun
time to comply with Building Regulation
requirements for internal kitchens or kitchens that
do not have an openable window. Adjustable
from 3-25 minutes.

FAQs Answered
Wall, window or panel models.
Available with integral timer or auto
humidity control.
Window fans fit 184mm hole. Wall and
Panel fans fit 152mm hole.

VA140/KH and VA150/KH with built-in

humidistat automatically switches the fan On
and varies the extract rate according to the
humidity level. VA140/UH and VA150/UH
are a single speed fan with integral humidity
control, the controller switches the fan On
when the Relative Humidity reaches the set
point. The fan will continue to run until the RH
falls below the set point. Both have integral
pullcord switching between automatic humidity
control and manual override.

Motor
Maintenance free, sealed for life ball bearings
in the purpose made electric motor, economical
and quiet running. Double insulated appliance.
Supply voltage 220-240V/1/50Hz.

For Wiring Diagrams see page 220.

Building Regulations
The VA140/VA150 Range is specifically sized
to meet the Building Regulation requirements
for powered extract ventilation in domestic
kitchens. All VA140/VA150 models have a
Trickle Ventilation Control facility fitted as
standard. The VA140/VA150 range is fitted
with internal and external louvres conforming to
the latest international safety standards.

Now available as complete units.

Model

VA140/150

216

224

80

146

60

55

104

152

VA150 A/P

216

224

130

184

VA140 Weight 1.75k

220

37
37

VA150 Weight 2.5kg

Manufacturers of some fluorescent/low energy

lighting systems indicate that these can interfere
with other electronic/timing circuits. For reliable
operation of these circuits we recommend therefore
that a tungsten filament light is used.

Stock
Ref. No.
KITCHEN WINDOW MODELS
VA150P WW
15 21 10B
VA150A WW
15 31 10B
VA150KX WW
15 01 20A
VA150KT WW
15 02 20A
VA150KH WW
15 03 20A
VA150KHT WW
15 04 20A
KITCHEN WALL MODELS
VA150KX WL
15 11 20A
VA150KT WL
15 12 20A
VA150KH WL
15 13 20A
VA150KHT WL
15 14 20A
KITCHEN PANEL MODELS
VA140 KP
14 01 20A
VA140 KT
14 02 20A
VA140 KH
14 03 20A
VA140 KHT
14 04 20A
VA140VS
42 72 05
UTILITY WALL MODELS
VA150UX WL
42 65 04
VA150UT WL
42 65 05
VA150UH WL
42 65 06
UTILITY PANEL MODELS
VA140 UP
14 01 10A
VA140 UT
14 02 10A
VA140 UH
14 03 10A

*Wall Kit

Brown
Brown
Brown
Brown

**Shutter
Actuator

m3/h

l/s

PI
I
T
T
T
T

220
220
220
220
220
220

PT
T
T
T

220
220
220
220

PT
T
T
T
PT
Brown
Brown
Brown

85 low
85 low
100 min

245
245
245 boost
245 boost
245 max

Watts

dB(A)
@ 3m

60
60
60
60
60
60

34
34
34
34
34
34

37
37
36
36
36
36

60
60
60
60

34
34
34
34

36
36
36
36

34
34
34
34
34

36
36
36
36
36

68
68
24 low
24 low
low

68 boost
68 boost
68 boost

PT
T
T

130
130
130

30
30
30

18
18
18

33
33
33

PT
T
T

150
150
150

30
30
30

18
18
18

33
33
33

*For Wall models with white external grille select appropriate VA140 Panel model plus white Wall Kit Stock Ref. No. 14 09 02A
**I = instant P = pullcord T = Thermo actuator

60

J
57

Extract Performance (id)

Type

VA140/KHT and VA150/KHT kitchen extract

fan with variable speed humidity control, timer
and pullcord which combines the functions of a
KH and KT.

For areas subject to extreme wind speeds, it is

recommended that baffle kits are used. Please
contact our Customer Service Department for
more details.

Integral timer and

humidistat

Window fixing hole 160mm. Can be

accommodated in hole sizes 152-184mm

Window fixing hole 184mm

Unique reversible
grommet for easy
installation

BB

BB

61

VA140/150 Range - kitchen and utility room fans

Slim profile panel model.

PA

>

B
20

AL
/W
W

2 Year Guarantee.

D
D

DO

>

The fan performance should meet the

Building Regulation requirements of 60 litres
a second for kitchens and 30 litres a second
for utility rooms. It should be double insulated
to meet the IEE wiring regulations.

AA

AA
30

EL

New long life ball bearing motor.

40

IN

>

Dimensions (mm)
Panel Model

Choice of shutters.

Performance

>

Typical Specification
Supply and install a VA140/150 axial fan
suitable for mounting in panels, walls or
windows with electrically operated
backdraught shutter and removable grille as
manufactured by Vent-Axia Ltd, Fleming
Way, Crawley, West Sussex, RH10 9YX,
Telephone: 01293 526062.

*H DIA.

VA150 Window and Wall

models, VA140 Panels models.

*H DIA.

Features and Benefits

>

STATIC PRESSURE (Pa)

Axial Kitchen and

Utility room fans

New Gemini Twin Fans

Features and Benefits
> Suitable for kitchen and utility room
applications.
> Comes complete with a plug in
power pack.
> Integrated backdraught shutter.
> Duty sharing features supplied as
standard.
> Meets Document F of the Building
Regulations.

Typical Specification
Supply and install a Gemini run and standby
fan suitable for mounting in wall, ceiling or
ducted applications as manufactured by
Vent-Axia Ltd, Fleming Way, Crawley,
West Sussex, RH10 9YX, Telephone:
01293 526062.
The fan performance should meet building
regulations of 60/30 l/s suitable for kitchens
or utility rooms.

100

For full details of System 50 components see

page 59.

347

170

224 69

99

35

Recessed 385

233

366 255

98 230

Duct

233

230 36

98

366

20

Additional 50mm
inlets if required

40

60

80 100 120 140

Cover removable
for access

Controls

Duet Recessed

A flush mounted twin fan model for recessed

applications.
Model
Stock Ref. No.
GTFF
45 74 80

Gemini Duct
A twin fan ducted model for in-line
applications.
Model
Stock Ref. No.
GTFD
45 74 81

Wall Fitting Kit

For use with Gemini range. Hole size 117mm.
Stock Ref. No.
25 41 02 - White
25 41 00 - Brown

Outlet

White Stock Ref. No. 56 35 21

Brown Stock Ref. No. 56 35 41

Vent-cowl for connection to 100mm

rigid pipe
Stock Ref. No. 56 14 03

Outlet can be side,

top or bottom

Duet Duct

100mm Flexible ducting.

Stock Ref. No. 56 36 04 (3 metre)
Stock Ref. No. 56 66 04 (6 metre)
A

Ecotronic Humidity Sensor -

Condensation trap for 100mm rigid duct

Stock Ref. No. 56 35 16

For wiring diagrams see page 226.

95

Dual sized spigots to

give either 50mm or
100mm standard pipe

Stock Ref. No. 56 35 32 or

Ambient Response Humidity Sensor Stock Ref. No. 56 35 50 or a

ThermoSwitch Stock Ref. No. 56 35 02B.

62

Cover removable
for access

49

Duty sharing fans, automatic changeover.

99

All Gemini units can be controlled using any of

the following Vent-Axia sensors :

Front inlet
grille

Quick fix 100mm wall grille

25

Overrun timer as standard, remote PIRs

or humidistat can be installed.

Cover removable
for access

Ivory Stock Ref. No. 56 14 01

Brown Stock Ref. No. 56 14 00

A surface mounted twin fan model with

100mm spigot.
Model
Stock Ref. No.
GTFS
45 74 79

Gemini Recessed

Air replacement grille set

Installation
The Vent-Axia Gemini range is designed for
installation in kitchens and utility rooms. Surface,
flush or duct mounting models are available.
The units meet Document F of the current
Building Regulations.

Gemini Surface

Models

Stock
Ref. No.

Performance
m3/h

Sound
Levels @ 3m

Speed
RPM

Max
Watts

Max
Amps

GTFS - Surface

45 74 79

216

43

1370

57

0.19

GTFF - Flush

45 74 80

205

44

1370

57

0.19

GTFD - Duct

45 74 81

195

46

1370

57

0.19

63

Additional 50mm
spigot in any 3 sid

All models incorporate a basic power pack

which includes the motor housing, power on,
fan run and fan fail neon indicator, which
allows you to install the back plate at the first fix
stage and plug in the power pack when the unit
is ready for use. The power pack is pre-wired
and incorporates a plug in arrangement for
fitting to the back plate.

Models

Inlet

Outlet

The Vent-Axia Gemini range of run and standby fans offers high performance double inlet
forward curve fan motor impellers, typically suitable for high system resistance installation.
In the event of failure the standby fan is operated, and visual fan failure indication (via
integrated or optional remote indication light) is illuminated. The surface mounting model
has a styled cover. For flush or duct mounting the power pack and back plate assembly is
located within a galvanised steel casing and fitted with either a PVC cover for flush
mounting or a galvanised steel cover for connection to ducts.

Built-in or remote LED indicator for fan

running and fan failure.

Ultra quiet ventilation

Can be used with either 100mm circular

ducting or System 50 flat duct.

20
0

White Stock Ref. No. 25 41 02

Brown Stock Ref. No. 25 41 00

Can be ceiling mounted.

35

40

Gemini Twin - run & standby kitchen and utility fans

Duet Surface
Wall fitting kit

FAQs Answered

60

Volume (m 3/h)

> Surface, flush and duct mounting

versions are available.

The Gemini range has an integrated overrun

timer function fitted as standard, enabling
versatile operation to comply with the Building
Regulations Part F1 for internal rooms and Local
Authority specification. The overrun timer can be
manually adjusted between 1 and 20 minutes.
(Units are factory set with the timer set to
approximately 20 minutes).

80

Dimensions (mm)
Surface

Accessories

Performance

System 50 Duct
Components

Static Pr essur e (Pa)

Run and standby fans

New Extractor hoods

Kitchen Extract Units

Features and Benefits

>

A choice of twelve styles for

domestic applications.

>

Wall, ceiling or cabinet fixed.

>

Compatible with System 50 flat

ducting (not suitable for Turin
model) or Vent-Axia aluminium
flexible ducting.

>

All models are provided with a

charcoal filter and washable
grease filter as standard.

>

All models are fitted with mains

lead, built-in lighting and choice of
3 speeds.

A choice of styles is available to include wall, or

cabinet fixed models to provide integrated
ventilation in any modular fitted kitchen from a
terraced galley kitchen to the most extensive
layouts. Models are available that can
recirculate or extract with the use of ducting.

The Building Regulations for the mechanical

ventilation of kitchens with openable windows in
dwellings require that extractor hoods should be
capable of extracting at a rate of 30 l/s
(108m3/h).

Models

Genova

Vicenza

An integrated extractor hood designed to

accept a kitchen cupboard door panel
matching the height and finish of existing units.
The panel canopy pulls out to provide an
automatic On/Off function. With a
recirculating facility, Napoli offers three speeds
with extract rates of 120/170/220m 3/h.
Napoli is supplied with a washable grease
filter and charcoal filter.

An extractor hood with flipfront glass visor

designed to be wall mounted or mounted
beneath a top cabinet.

Vicenza 900mm width chimney extractor

hood with standard grease filter, optional
carbon filter. Offering three speeds with extract
rates of 270/350/450m 3/h. Finished in
stainless steel.

The motor is mounted on an easy to unlock

maintenance bracket. Wall brackets feature a
'Depth Adjuster'. Finished in White.

When used with ducting, the resistance of the

entire system should be considered so that the
required performance is achieved. Extractor
hoods should not be sited where ambient
temperatures are likely to exceed +50C.
Extractor hoods are not suitable for use above
an eye level grill.
Must be mounted between 760mm and
900mm above the hob.
Do not flamb underneath a hood. When
frying, NEVER leave the pan unattended in
case of fire.

Rimini, Milano and Roma

Pre-wired with 500mm of 3 core cable.

2 x 40 watt lamps provide light facility.

Top exhaust facility.

100 or 125mm dia. exhaust duct spigot.

Supply voltage 230-240V/1/50Hz.

Washable grease filters.

2 x 40 watt lamps provide light facility.

2 x 40 watt lamps provides light facility.

100mm exhaust spigot.

100mm/125mm exhaust spigot.

Supply voltage 230-240V/1/50Hz.

Supply voltage 230-240V/1/50Hz.

Stock Ref. No. 12 08 11

2 x 20 watt lamps provide light facility.

Supply voltage 230-240V/1/50Hz.

Stock Ref. No. 12 08 01

Siena
Siena 600mm width chimney extractor hood
with standard grease filter, optional carbon
filter. Offering three speeds with extract rate of
300/380/490m 3/h. Finished in stainless
steel.

2 x 40 watt lamps provide light facility.

Supply voltage 230-240V/1/50Hz.

Stock Ref. No. 42 60 87

Rimini Stock Ref. No. 42 71 66

Milano Stock Ref. No. 12 08 41
Roma Stock Ref. No. 12 08 51

64

Ducted to atmosphere recommended to

meet Building Regulations.

Integral switching only.

The motor is mounted on an easy to unlock

maintenance bracket. Top or rear exhaust
facility. Finished in White.

Stock Ref. No. 42 60 86

Rimini (500mm width), Milano (600mm width)

and Roma (900mm width) are domestic
stainless steel chimney extractor hoods with an
extending chimney to fit varying ceiling heights.
With a recirculating facility, the extractor
hoods are driven by powerful twin fans to
give three speeds with extract rates of
340/420/460m 3 /h. A washable metal
grease filter and charcoal filter are supplied.
Finished in stainless steel.

FAQs Answered

With a recirculating facility, Genova

offers three speeds with extract rates of
100/160/220m3/h. Genova is supplied with
a washable grease filter and charcoal filter.

65

Extractor hoods kitchen extract units

Kitchen ventilation
Vent-Axia offers a range of extractor hoods
for the removal of cooking odours and
steam at source in the domestic kitchen.
Each model is designed to provide the
extraction levels necessary to comply with
Building Regulation requirements for
kitchens with ducted outlets plus models that
provide higher outputs for busier kitchens.

Napoli

New Extractor hoods (Contd)

Dimensions (mm)
Rimini
Genova
Napoli
Milano
Stock Ref. No. 42 71 66 12 08 01 12 08 11 12 08 41

Florence

Messina 900mm width chimney extractor hood

with standard grease filter, optional carbon filter.
Offering three speeds with extract rate of
230/290/430m3/h. Finished in stainless steel.

Florence 600mm width chimney extractor

hood with standard grease filter, optional
carbon filter. Offering variable speeds with
extracts rate of 300/380/490m3/h. Finished
in stainless steel.

900

Palermo
42 60 88

900

900

500

600

600

900

150

450

580-940

580-940

380-670

400-600

500

470

275

500

500

500

550

550

520-545

510

550

170

495

210

170

170

321

321

203

205

180

240

84

55

240

240

246

246

208

203

275

66

330

275

275

121

62

210

335-355

340

13

16.5

262

13

300

50

225

50

50

125

56

125

13

125

900

Palma
42 60 89

580-940

800-1160 800-1160

600/900

Florence
Turin
42 60 90 42 60 83
600/900

1025

580-940

470-880

518

1025

321

283

476

335

256

180

154

300

70-125

290

262

30

262

310-590 800-1160

61

385

30

20

45

20

20

11kg

7.5kg

10.6kg

12.0kg

14.0kg

22.4kg

28.2kg

17.6kg

15.2kg

16kg

23.7kg

13.8kg

38.8kg

210

210

325

325

240

240

185

225

200

240

280

240

Watts (incl lamps) 225

Messina

900

Messina
Siena
42 60 85 42 60 87

Weight

Ancona 900mm width chimney extractor hood

with standard grease filter, optional carbon filter.
Offering three speeds with extract rate of
220/300/380m3/h. Finished in stainless steel.

Ancona
42 60 84

Ancona

Vicenza
42 60 86

600

Roma
12 08 51

Rimini/Milano/Roma

Messina

125

2 x 20 watt lamps provide light facility.

2 x 20 watt lamps provide light facility.

2 x 40 watt lamps provide light facility.

Supply voltage 230-240V/1/50Hz.

Supply voltage 230-240V/1/50Hz.

Supply voltage 230-240V/1/50Hz.

R 25

Ancona

Siena
E

50
33

R 50

Turin

Palermo
D

Stock Ref. No. 42 60 90

Stock Ref. No. 42 60 85

Stock Ref. No. 42 60 84

Florence

Palma

Extractor hoods kitchen extract units

Vicenza
D

Napoli

Genova

Palma

Palermo

Palma 900mm width chimney extractor hood

with standard grease filter, optional carbon filter.
Offering three speeds with extract rate of
230/290/430m3/h. Finished in stainless steel.

Turin

Palermo 900mm width chimney extractor hood

with standard grease filter, optional carbon filter.
Offering three speeds with extract rate of
300/380/490m3/h. Finished in stainless steel.

2 x 40 watt lamps provide light facility.

Turin 1025mm width chimney extractor hood

with corner fixing and standard grease filter,
optional carbon filter. Offering three speeds
with extract rate of 450/610/800m 3/h.
Finished in stainless steel.

2 x 20 watt lamps provide light facility.

Supply voltage 230-240V/1/50Hz.

Supply voltage 230-240V/1/50Hz.

Stock Ref. No. 42 60 89

Stock Ref. No. 42 60 88

C H

Rimini

Genova

Napoli

Milano

Roma

Vicenza

Ancona

Messina

Siena

Palma

Palermo

Florence

Turin

Size

500

600

600

600

900

900

900

900

600

900

900

600

900

Performance m3/h

230
290
430

100
160
220

120
170
220

340
420
460

340
420
460

270
350
480

220
350
380

230
290
430

300
380
490

230
290
430

300
380
490

300
380
490

450
610
800

Static Pressure (Pa)

220
250
270

110
150
190

110
150
190

220
240
250

220
240
250

260
300
330

260
300
330

220
250
270

270
310
340

220
250
270

260
300
330

270
310
340

280
430
450

4 x 10 watt lamps provide light facility.

Spigot Dia

125

100

125

125

125

125

125

125

125

125

125

125

125-150

Supply voltage 230-240V/1/50Hz.

Max dB(A)

57

47

47

47

47

60

60

57

56

57

60

56

57

Stock Ref. No. 42 60 83

66

67

Vent-Axia Freshvent
Natural Ventilation

Features and Benefits

>

Completely silent, all year round

ventilation

>

Complements existing ventilating

fans.

>

Filtered, natural air without

draughts.

>

Control of the indoor environment.

>

Helps
prevent
condensation.

>

No energy consumption, no
running costs.

>

Colour: White

damaging

Kitchens, utility rooms, bathrooms and toilets are

rooms where conventional domestic extract fans
are normally found. The natural ventilation
principle of Freshvent 100 is particularly suitable
for clean living spaces such as bedrooms,
lounges and work rooms.

FAQs Answered

There are four Vent-Axia Freshvent 100 models

and an extensive range of accessories available
to customise the units to your exact requirements.
Both units are easily dismantled allowing quick
access to the filter for cleaning or replacement.
The high capacity of the filter, results in fewer
filter changes. The damper plate is insulated
against condensation and noise penetration.

Acoustic Duct Versions

Acoustically damped pipe fitted around unit to
reduce external sources of noise such as traffic.
Suitable for bedrooms and other rooms where
low noise levels are a priority. Comes complete
with Freshvent 100 db and Freshvent 100
Thermo db versions.

Freshvent 100 - Pullcord operated. Designed

to provide filtered air from outdoors while
mixing it efficiently with the air in the room.
Adjustable to increase or reduce the free area
and airflow to suit a particular environment.
Stock Ref. No. 45 32 00
Freshvent 100 dB - Pullcord operated.
Adjustable to increase or reduce the free area
and airflow to suit a particular environment.
Supplied with acoustically damped pipe for
applications requiring low noise levels.
Stock Ref. No. 45 32 08
Freshvent 100 Thermo - Thermostatically
regulated, with the vent size automatically
adjusting according to the temperature outside.
As the temperature decreases the damper
closes, opening again as the temperature rises.
The built-in thermostat regulates the size of the
damper opening so that it starts to close at
10C and is completely closed at -5C.
Stock Ref. No. 45 31 82
Freshvent 100 Thermo dB Thermostatically regulated, with the vent size
adjusting according to the temperature outside.
As the temperature decreases the damper
closes, opening again as the temperature rises.
The built-in thermostat regulates the size of the
damper opening so that it starts to close at
10C and is completely closed at -5C.
Supplied with acoustically damped pipe for
applications requiring low noise levels.
Stock Ref. No. 45 32 53

No electrical connection required.

Acoustic version available.
Can be used as an outlet for stale air or
to provide replacement air.
Thermostat version or pullcord version
available.
Environmental filters and storm shield
available.

Models

All versions come with a standard general

duty filter. Replacement filters are available.

Cut-away view of thermostatically

activated ventilator

Filter for Freshvent 100

Especially recommended to
assist with allergies and
asthma. Highly effective
against traffic fumes, viruses
and bacteria. Heat resistant up to 100C. The
filter needs to be changed regularly (dependent
on location) to maintain its efficiency.
Stock Ref. No. 45 31 91 to suit Freshvent 100
versions.

Pollen filters

- Class EU3 filter with high

capacity to separate dust and pollen to assist
with allergies. More compact than a standard
filter, it is manufactured from synthetic fibres.
Heat resistant up to 100C. Washing is not
required.

Stock Ref. No. 45 32 03 to suit Freshvent

Thermo 100 versions.

Storm shield

- Prevents the
ingress of water and
eliminates the risk of draughts
and cold air surges during
high winds, closing entirely
during storms. The shield acts
as a check valve, and is
mounted in the pipe section with acoustic
damping. Recommended as a standard fitment
for exposed locations, coastal areas and
highrise applications. Manufactured from
polystyrene and UV resistant silicon. Not
suitable for db models.
Stock Ref. No. 45 32 06

Air Replacement Grille Set - Suitable for

fitting to doors and panels to allow better
internal air circulation and replacement.
Consists of a two-piece telescopic set, which
fits unobtrusively on either side of the door
panel. Minimum fixing thickness 30mm.
Plastic.
Dimensions: 454 x 90mm.
Stock Ref No: Ivory 56 14 01
Brown 56 14 00
Exterior Grille (Brown)
Stock Ref. No. 45 32 26

Extension

Wall Bushing - On
applications where the wall thickness exceeds
360mm an additional wall sleeve is available.
For use with non db versions (150mm long).
Stock Ref. No. 45 32 75

Stock Ref. No. 45 31 88

Filter for Freshvent 100 Thermo

68

Stock Ref. No. 45 31 97

Dimensions (mm)

- Class EU7 filter with

extremely high separation capacity.

Stock Ref. No. 45 31 94 to suit Freshvent 100

versions.

Freshvent 100 is a range of passive ventilators that simply and naturally provide the
effective ventilation needed by everyone working and living in an indoor environment.
When used with positive pressure ventilation, Freshvent 100 provides an important outlet
for air circulating around the house. Stale air is expelled through the unit to the outside
without letting in noise and draughts.
This makes Freshvent 100 particularly suited to
the tight construction of new homes - and
provides a stylish alternative to traditional
slot/airbrick type ventilators. In addition,
Freshvent 100 is ideal for older properties that
have been refurbished with double glazing and
loft insulation. They require ventilation to combat
the problems associated with condensation.

The unit should be of 100mm diameter and

should be connected to rigid duct through the
wall. The unit should be either pullcord
operated or thermostatically controlled and
should have no electrical connections. The unit
should also have an acoustic liner available to
reduce noise ingress.

Accessories
Environmental filters

69

Vent-Axia Freshvent - natural ventilation

Natural Ventilation

Typical Specification
Supply and install the Freshvent, a passive
ventilation unit for walls as supplied by
Vent-Axia Ltd, Fleming Way, Crawley,
West Sussex, RH10 9YX, Telephone:
01293 526062.