Centrifugal Fans

Model USF
• Commercial & Industrial Applications
• Single Width

July
2019
Centrifugal Fans

Greenheck's single-width centrifugal fans are designed to provide efficient and reliable operation for commercial
and industrial applications. Our products are manufactured with state-of-the-art laser, forming, spinning and
welding equipment, and undergo quality control testing to ensure a trouble-free start-up.

Benefits of Greenheck Centrifugal Products

• AMCA licensed performance and UL Listed
• Ease of selection using Greenheck’s eCAPS® or CAPS®
software selection tools
• Tiered product portfolio offering the best value fan for
any given application
• AutoCAD® and Revit® models available for download
• Quick Build and Fast Pass expedited
shipping programs
• Factory tested prior to shipment

Certifications
Air AMCA Sizes Wheel
Performance

A1 Sound and Air 18 - 73 AF

B1 Sound and Air 7 - 73 BI
B2 Air 4 - 24 BI
B3 Air 4 - 18 BI Certified data may be found in Greenheck’s Computer
Aided Product Selection program (CAPS)
B4 Air 27 - 49 BI
B5 Air 6 - 10 BI
F1 Air 9 - 24 FC
F2 Air 6 - 10 FC

UL/cUL 705 Listed Power Ventilator

UL/cUL File E40001
UL/cUL 762 Power Ventilators for Restaurant Exhaust Appliances
UL/cUL File MH11745
UL/cUL Power Ventilator for Smoke Control Systems
UL/cUL File MH17511

Manufactured in the USA

Model USF fans are built in one of two
manufacturing locations, Schofield, WI and
Shelby, NC. Multiple manufacturing locations
enables us to build fans and get them to you,
our customer, faster.

Quick Build Availability

Select model USF fan configurations are available
in as little as 3 days on our Quick Build program.

2
Applications

Greenheck’s centrifugal products are designed to handle a variety of commercial and

industrial applications:
• General supply, return or exhaust systems • Filter houses and dust collectors
• Emergency smoke exhaust (buildings, car parks, etc.) • Built-up or custom air handlers
• Restaurant grease exhaust • Spark-resistant fume exhaust
• Stairwell pressurization • Corrosivee fume exhaust
• Process heat exhaust • Grain drying
ing

Emergency Smoke (UL/cUL Listed):

Atriums, libraries, multi-story buildings
Select Greenheck centrifugal fans are UL/cUL Listed for Power
Ventilators for Smoke Control Systems. Fans can be installed for
dual application use or as a dedicated emergency system, with the
primary function of the fan being general air movement, but built to
withstand operation seen in emergency smoke situations. The UL
Listing indicates the model is designed and tested to exhaust heat
and smoke in an emergency situation.
The emergency high temperature option is suitable
for the following temperatures:

Operating Temperature Time Duration

500ºF (260ºC) 4 hours UL/cUL 705 Listed Power Ventilator
572ºF (300ºC) 2 hours UL/cUL File E40001
UL/cUL 762 Power Ventilators for Restaurant Exhaust Appliances
752ºF (400ºC) 2 hours UL/cUL File MH11745
1000ºF (538ºC) 15 minutes UL/cUL Power Ventilator for Smoke Control Systems
UL/cUL File MH17511

High Temperature Process Exhaust:

Kilns, Dryers, Furnaces
Designed for applications involving elevated temperatures above 250°F (121°C) continuously for extended
periods of time. Material and arrangement choices are limited to components suitable for this application
and located to minimize effects. Fans manufactured with a high temperature process package include high
temperature shaft seal, heat slinger, high temperature fan bearing grease, and high temperature coating on steel
fans. Heat slinger dissipates heat being transferred down the fan shaft preventing bearing grease evaporation.
Applications up to 1000°F can be handled with the use of stainless steel materials.

Restaurant Grease Exhaust (UL/cUL 762 Listed):

Restaurants
The centrifugal scroll fans are designed for high pressure restaurant grease
e exhaust
applications. Either Permalock™ or welded housing are available with UL/cULcUL
Listing of Power Ventilators for Restaurant Exhaust Appliances. The welded d
housing is suitable for indoor or outdoor mounting locations, whereas
the Permalock™ housing is suitable for outdoor kitchen ventilation
installations. Listing tests exceed duct temperatures of 400°F (204°C)
continuous operation. UL/cUL 762 selections require a drain connection
and access door for cleaning.

3
USF Direct Drive

Efficiency – Controllability – Simplicity

The USF direct drive model (100 series only) is an arrangement 4 utility set fan with a backward-inclined or
forward-curved centrifugal wheel. The housing is constructed from galvanized steel with a bolted frame. High
performance powder coating is optional. Fans are provided with an integral speed control for easy system
balancing. Simplified wiring and preprogrammed variable frequency drive (3-phase) make installation quick
and easy.
Standard Construction and Configuration Accessories
• Volume up to 6,500 cfm • Inlet guard
• Static pressure up to 3 in. wg • Outlet flange
• Galvanized or coated steel • Outlet guard
• Greenheck’s Permalock™ lock seam scroll • Backdraft gravity damper
• Aluminum wheel • Neoprene isolators
• NEMA-3R, toggle switch, mounted and wired • Equipment supports
• Bolted access door • Extended warranty
• Weatherhood
• Drain Simplified Wiring
Easy to install – featuring a terminal strip, disconnect
and speed control mounted and wired by the factory.

Direct Drive Motor

Low maintenance – no belts,
bearings or pulleys to service.

Integrated Speed Control

Speed control is mounted, wired and programmed at the factory.
Adjust fan speed with the push of a button.
Single-phase applications use Greenheck’s
electronically commutated (EC) Vari-Green® motor
with a control dial for adjustment.
Three-phase applications use a NEMA Premium
Efficient motor with variable frequency drive (VFD).
1- and 3-phase options can be controlled via
0-10 vDC signals.

Vari-Green Motor Benefits 3-Phase Motor with Micro Drive (VFD)

Greenheck’s electronically Electronically commutated (EC) motors are great
commutated (EC) Vari-Green for single-phase applications. However, once a fan
motor combines motor technology, performance approaches 1 hp, motors move to
controllability and energy-efficiency 3-phase applications.
into a single low-maintenance unit Using a 3-phase induction motor with a micro drive
and is the industry’s first fully-controllable motor. (VFD) is a good way to get the same functionality as
• Motor can attain up to 85% efficiency, reducing an EC motor.
energy consumption. • 3-phase induction motors are just as or more
• 80% usable RPM turndown vs. 30% on AC single- efficient than single-phase EC motors.
phase direct drive, allowing for a broader speed • Micro Drive (VFD) allows motor to speed up or
adjustment covering more fan performance ranges. slow down to achieve desired RPM.
4
Construction Options

Wheels
Greenheck centrifugal fans have multiple wheel options. All wheels are statically and dynamically balanced to
grade G6.3 per ANSI S2.19.

Backward-Inclined (BI) Airfoil (AF) Forward-Curved (FC)

Wheel Type

General purpose, clean air

Application Clean air or fume exhaust Clean air
or severe environments
Temperature Up to 1000ºF (538ºC) Up to 500ºF (260ºC) Up to 180ºF (82ºC)
Steel
Steel Steel
Construction Aluminum
Aluminum Aluminum
316 Stainless Steel

Permalock™ Housings Welded Housings

Permalock™ housings use Optional on Class 0, I, II
a mechanically fastened and standard on larger fan
seam instead of welding. sizes, centrifugal fans are
This airtight and watertight manufactured with heavy gauge,
housing construction uses the welded housing construction. All
same structural support as all welded construction is common
welded housings. Permalock™ for industrial applications and
construction is an excellent value is suitable for pressures up to
engineering option for applications 22 in. wg (5.5 kPa).
up to 8.5 in. wg (2.1 kPa).

Alternative Materials
Greenheck offers centrifugal fans in aluminum or stainless steel construction as an alternative to coated
steel. Aluminum construction provides advantages for applications with high moisture and various chemicals.
Aluminum also reduces the weight of the fan if there are structural concerns. Stainless steel (316L) construction
is used for environments subject to continuous high heat up to 1000ºF (538ºC) or severe corrosives. Both
aluminum or stainless steel construction can be applied to the entire fan (housing, wheel, inlet cone and drive
frame) or the airstream components (housing, wheel and inlet cone) only.

Spark-Resistant Construction
Greenheck centrifugal fans are available with spark-resistant designs suitable for applications that involve
flammable particles, fumes or vapors. Spark-resistant construction options adhere to guidelines defined within
AMCA Standard 99-0401-86.
Housing
All parts in contact with the airstream are Wheel
Spark A constructed of non-ferrous material (usually
aluminum).
The fan wheel is constructed of a non-ferrous
material (usually aluminum). A non-ferrous
Spark B
(aluminum) rub ring surrounds the fan shaft
where it passes through the fan housing.
The inlet cone is constructed of non-ferrous
material (usually aluminum). A non-ferrous
Spark C
(aluminum) rub ring surrounds the fan shaft
where it passes through the fan housing. Inlet Cone
Pedestal
5
Construction Options

Protective Coatings
Greenheck offers a wide variety of protective coatings suitable for corrosive applications. All coatings are
electrostatically-applied baked powders that offer a durable, long lasting finish. For more information on our
complete offering of coatings, visit www.greenheck.com and navigate to Resources/Library/Application-Articles.
Search for Performance Coatings for Ventilation Products.
Chemical Resistance Ratings
Sulfuric Acid HCI Chlorine NaOH
Chemical Bleach (10%) (10%)
MEK
(0.1%) (20%)
Permatector 0 1 2 2 0 —
Hi-Pro Polyester 0 0 0 1 0 —
Hi-Pro-Z 0 0 0 1 0 1
0 - No effect
RATING 1- Slight change in gloss or color
DESCRIPTIONS 2 - Surface etching, severe staining, but film integrity remains
3 - Significant pitting, cratering, swelling, or erosion with obvious surface deterioration

Two-Coat Advantage
For corrosive environments, use Greenheck’s Hi-Pro-Z two-coat coating technology. Test data demonstrates
our two-coat paint system offers four times the corrosion resistance of other coatings commonly available
within the fan industry.
Epoxy Primer
Topcoat

4-6 mils Total Advanced

Surface Preparation

Base Steel

Performance Tested
When selecting a powder coating finish for heavy-gauge welded steel fans, critical information such as
environment, moisture, exposure, abrasives, and chemicals should be considered.
Powder coatings are the best choice for most extreme applications. Major advantages over most
vendor-applied liquid coatings include:
Environments
• Superior finish with uniform coverage and thickness
ABRASIVE PARTICLES

• A better coating provides better protection

EXTREME WEATHER

• The process is environmentally friendly

CHEMICAL*

• Unequaled value
CLEAN AIR

COASTAL

SUN-UV

Coatings Color Coating Specifications

Permatector™ Thickness: 2.0 - 3.0 mils
Standard coating for steel products in Polyester urethane X X
One Coat

both indoor and outdoor applications powder coating

Process

Hi-Pro Polyester Thickness: 2.0 - 3.0 mils

Concrete Grey
RAL 7023

Formulated for exterior durability, High performance

X X X
color and gloss retention. Excellent for polyester urethane
chemical applications. powder coating
Hi-Pro-Z Thickness: 4.0 - 6.0 mils
Two Coat
Process

Two-coat powder paint coating is Hi-Pro Polyester

X X X X X X
resistant to saltwater, chemical fumes and topcoat with epoxy
moisture in corrosive environments basecoat
Note: Hi-Pro-Z is not available on aluminum. * Chemical Resistant Rating Above

6
Construction Options

Vibration Analysis
All centrifugal wheels undergo a computerized balance analysis to a grade of G6.3. In addition, USF 500 series
centrifugal products endure a complete mechanical vibration test after assembly. Our custom data acquisition
system uses tri-axial accelerometers to measure the vibration in three planes at the design operating speed. A
permanent record for each fan’s performance is kept on file and is available upon request.
The standard “filter-in” vibration levels attained
meet the requirements of Fan Application BV-3
as defined in AMCA Standard 204-05 “Balance
Quality and Vibration Levels for Fans”. Consult
factory if more stringent vibration levels
are necessary.

Filter-In
Drive Type Vibration Limit
(Rigidly Mounted) Copies of these signatures are kept
Belt 0.15 in/sec-pk on file and are available upon request.

Direct Arrg. 4 0.08 in/sec-pk

Direct Arrg. 8 0.15 in/sec-pk
500 series only

Split Housings
Quad split housings can solve many space limitation problems
in both retrofit and new construction situations.
Not available on 45° discharges TAD, BAD.
Size Limitations:
7 - 73 Bolt-on Pedestal Standard
33 - 73 Quad Split Optional
500 series only
Shown with bolt on pedestal
pede and
quad split housing (option)

Premium Bearings
Belt drive centrifugal products are manufactured with “Air Handling Quality”
self-aligning ball or roller pillow block bearings. All bearings include zerk fittings
for relubrication and are selected for a basic rating fatigue life of L10 in excess of
80,000 hours (L50 at 400,000 hrs.) at the maximum RPM for the selected pressure
class. 400 and 500 series models utilize concentric locking collars for smoother
operation and providing superior grip force between the bearing collar and fan shaft.
For more critical applications, 500 series models offer bearings with a minimum
L10 life in excess of 200,000 hours (L50 at 1,000,000 hrs.)

Equal to L50 or
L10 Life
Average Life
Industry Standard 40,000 hrs. 200,000 hrs.
USF Standard 80,000 hrs. 400,000 hrs.
500 Series Upgrade 200,000 hrs. 1,000,000 hrs.

L10 life implies 90% reliability or 10% failure rate after the stated hours.
L50 life implies 50% reliability or 50% failure rate after the stated hours.

7
Configurations

Arrangement 10 — Belt Drive Arrangement 9 — Belt Drive

• Recommended as first choice configuration for belt • Bearings are mounted out of the airstream
drive applications • Easy access to large motors mounted on drive frame
• Most compact belt drive arrangement • Standard motor position is on the right side of the
• Bearings are mounted out of the airstream drive frame
• Motor is mounted beneath the drive frame • Optional motor position is on the left side of the
• Available with a weatherhood to cover motor, drives drive frame
and bearings • Available with motor cover, belt guard and shaft guard
• Moderate dirt and heat tolerance

Arrangement 1 — Belt Drive Arrangement 3 — Belt Drive

• Bearings are mounted out of the airstream • Bearings are mounted in the airstream
• Unlimited motor size • Unlimited motor size
• Requires an isolation base (by factory) or structural pad • Requires an isolation base (by factory) or structural pad
to mount the fan and motor to mount the fan and motor
• Choice of motor positions W, X/Y or Z (see page 9) • Choice of motor positions W, X/Y or Z (see page 9)
• Available with motor cover • Available with motor cover, belt guard
• Suitable for high temperatures or contaminated air • Recommended for clean air at ambient temperatures

Isolation Base Isolation Base

Arrangement 4 — Direct Drive Arrangement 8 — Direct Drive

• Available with partial width wheel and housing modifications • Available with partial width wheel and housing modifications
for specific performance for specific performance
• Recommended for higher horsepower applications in lieu • Recommended for higher horsepower applications in lieu
of belt drive of belt drive
• Limited to standard motor speeds, but are available with • Limited to standard motor speeds, but are available with
variable frequency drive compatible motors variable frequency drive compatible motors
• Provides compact design with low maintenance • Bearings located out of the airstream
• Available with motor cover • Suitable for high temperatures or contaminated air
• Available with motor cover, belt guard

8
Configurations

Discharge Positions and Rotatable Housings

Rotation and discharge is always determined from the drive side of the fan.

CW BAU CW UB CW TAU CW TH CW DB CW BH

CCW BAU CCW UB CCW TAU CCW TH CCW DB CCW BH

Motor Positions — Arrangements 1 and 3 Fans

Fan arrangements 1 and 3 require a structural steel base or
structural platform to support the fan and motor. The motor can
Fan be located in any of three positions around the fan shaft to ensure
Z W
proper alignment. Motor positions W and Z tend to make a longer
X/Y footprint from end to end. Positions X/Y tend to make a shorter but
wider footprint.
Motor position and fan rotation are
determined from drive side

Class of Construction
AMCA defines fan class based on minimum outlet 60
25
60 75 100 125 150 200 RPM
BHP
velocities and pressures a fan must be capable to 50% WOV % WOV
Density 0.075 lb/ft
3
VE

3
Density 1.2 kg/m
produce. Fan classes are designated as 0, I, II, III 50 60% WOV
CUR

20
70% WOV
Static Pressure (Pa x 100)

or IV. As the fan class increases, the outlet velocity

EM

40
Static Pressure (in. wg)

YST

20

and pressure requirements increase as defined

82

40 80% WOV
SS

15 30 19
THI

in AMCA Standard 99. As the outlet velocity and 25

00
OF

pressures increase, the fan construction (material

T

17

20
LEF

27

10
gauge, shaft diameter, motor size, etc.) must also
16
HE

00

15 15
00
OT

20 13 90% WOV
change to physically accommodate the faster
TT

71
10
EC

12
00
RPMs required. 7½
EL

5 10
51
TS

5
900
NO

3
Centrifugal products are available in Class 0, I, II, 750
DO

600

III, or IV, with Class 0 having the lowest maximum 0 0

0 10 20 30 40 50 60 70
fan RPM and Class IV having the highest maximum Volume (cfm x 1000)

fan RPM. 0 20 40 60 80 100

3
A typical fan curve is shown with shaded class Volume (m /hr x 1000)

limits. For specific certified fan data, please Class Class Class Class Class
consult Greenheck’s Computer Aided Product 0 I II III IV
Selection program, CAPS.

9
Accessories

Vibration Isolators and Isolation Bases

Greenheck offers a complete package of vibration isolators, isolation bases and inertia bases to simplify field
assembly and reduce transmitted vibrations.
Refer to the catalog on www.greenheck.com/Resources/Library/Literature. Search for Mounting Bases and
Vibration Isolation.

Mounting Types
Direct Mount
No base required, isolators are attached directly to equipment. Direct
isolation can be used if equipment is unitary and rigid without the use of
additional support. Direct isolation is not recommended for equipment
having large overhung loads (e.g. motors on arrangement 9 fans). If there
is any doubt that equipment can be supported directly on isolators, use
bases or consult the factory.

Isolation Base
Isolation bases consist of formed steel members welded into a rigid one-
piece base. A motor slide base is included where applicable. Bases are
required for all arrangement 1 and 3 fans with independently mounted
motors. Isolation bases are available without isolators, with rubber
Isolation base mounts or with spring mounts. All formed steel bases with spring mounts
with height
saving brackets
incorporate height saving brackets.

Inertia Base
Inertia bases may be desirable where isolation bases do not provide
sufficient mass or where discharge velocities cause greater reaction
forces. The additional weight of the concrete reduces the vibration
amplitude and reduces reaction forces from fan thrust and start and
stop motion. Concrete is by others.
Inertia base Note: Motor slide base is included on arrangement 1 & 3 fans.

Isolator Types
Rubber Mount Restrained Spring Mount
Neoprene mountings consist of a steel Restrained spring isolators consist of
top plate and base plate completely laterally stable, free-standing springs
embedded in colored (oil-resistant) assembled into a steel housing. These
Neoprene neoprene for easy identification of assemblies are designed for vertical
capacity. Neoprene mountings are furnished with a and horizontal motion restraint.
tapped hole in the center. This enables the equipment Restrained Springs provide 50% overload capacity
to be bolted securely to the rubber mount. and are color coded or identified to
indicate load capacity. Restrained spring mounts are
Free-Standing Open Spring Mount recommended for equipment subject to wind-loading
Free-standing spring isolators are or large torquing forces. They are also used for
unhoused laterally stable steel springs. equipment subject to large weight changes such as
They provide a minimum horizontal swing-out fans.
stiffness of 0.8 times the rated vertical
Free stiffness and provide an additional 50%
Standing overload capacity. These isolators are
equipped with a top mounted adjusting bolt and an
acoustical non-skid base. Springs are color coded or
identified to indicate load capacity.
10
Accessories

Access Door Inlet and Outlet Guards

Bolted or hinged access doors provide access for Removable inlet and outlet guards provide
cleaning or inspection. protection for personnel and equipment in non-
ducted installations. Inlet and outlet guards meet
Backdraft Damper OSHA guidelines.
Backdraft dampers are available in galvanized,
painted steel or aluminum construction and include Motor Cover (Arrg. 1 W or Z, 3, 4, 8, 9)
counterweights for tight closure when the fan is A weatherproof motor cover shields the motor
de-energized. components from dust, dirt and moisture for
outdoor installations.
Belt Guard
Belt guards are designed to allow easy access to the Shaft Guard (Arrg. 1, 8 or 9)
belts and pulleys for service. All belt guards include Shaft guards are designed to cover shafts and
tachometer openings to monitor the fan speed as bearings. Extended lube lines are optional for bearing
well as an access panel for testing belt tension. Belt lubrication without removal of the guard. Shaft guards
guards meet OSHA guidelines. meet OSHA guidelines.

Disconnect Switch Shaft Seal

Greenheck offers a wide selection of NEMA rated A felt, neoprene, or ceramic shaft seal with a rub ring
fusible or non-fusible disconnect switches. Switches is available for operation at high temperatures or for
can be factory mounted or shipped loose for exhausting contaminated air.
field installation.
Stainless Steel Shaft
Drain with Plug Stainless steel fan shafts are available for applications
A one-inch (25 mm) threaded drain connection is where standard carbon steel shafts may exhibit
located at the bottom of the fan housing to drain excessive corrosion or heat stress.
water that may accumulate.
Sure-Aire™
Extended Life Bearings Non-invasive flow monitoring system capable of
Extended life bearings are selected for a basic rating capturing accuracy within 3% and available with or
fatigue life L10 per ABMA Standards in excess of without electronics. Clean air applications only.
200,000 hours at the maximum RPM. L10 is the life
associated with 90% reliability of a bearing. Weatherhood (Arrg. 1 X/Y, 10)
Vented steel weatherhoods protect the motor and
Extended Lubrication Lines drive components from rain, moisture, dust, and dirt.
Single-width fans are available with flexible nylon Weatherhoods meet OSHA guidelines and are easily
or copper tubing extending from the bearings to removed for service access.
conveniently located grease fittings mounted on the
fan pedestal (or on the exterior of weatherhood if a
weatherhood is supplied). Volume Control:
Grease Containment Volume Control Damper
Grease trap is designed to collect grease residue to Control dampers are available in painted
avoid drainage onto roof surface. Grease traps ship steel, aluminum or stainless steel.
loose for field installation. Actuator options include manual quadrant
or electric.
Heat Slinger
VFD Rated Motor
The heat slinger is an aluminum cooling disc mounted
on the fan shaft between the inboard bearing and the Variable frequency drives (VFD’s) change the
blower housing to dissipate heat conducted along the frequency of the input power to the motor, which
fan shaft. results in changing the motor’s speed. Changing the
speed of the fan provides the greatest potential for
Inlet Companion Flange energy savings at partial loads.
Punched companion inlet flanges are available on
single-width fans.

Inlet and Outlet Flanges

Optional inlet flanges on single-width fans are pre-
punched and welded to the inlet collar. Punched
outlet flanges are standard on fan sizes 33-73.
11
Centrifugal Fans

Greenheck’s Centrifugal Product Offering

Greenheck’s tiered model approach gives you flexibility in size, performance and
construction matching the appropriate model to your application. Our centrifugal
product line offers a variety of options in construction features, materials and
performance by model.

• Backward-inclined, forward-curved or airfoil wheel options

• Class 0-4 pressure ratings
• Permalock™ or fully welded scroll designs
• Belt or direct drive configurations
• Galvanized, coated steel, aluminum or stainless construction materials
• Spark-resistant or high temperature packages

Enjoy Greenheck’s extraordinary service, before, during and after the sale.
Greenheck offers added value to our wide selection of top performing, energy-efficient products
by providing several unique Greenheck service programs.
• Our Quick Delivery Program ensures shipment of our in-stock products within
24 hours of placing your order. Our Quick Build made-to-order products can be
produced in 1-3-5-10-15-20 or 25-day production cycles, depending upon their
complexity.
• Greenheck’s free Computer Aided Product Selection program (CAPS), rated by
many as the best in the industry, helps you conveniently and efficiently select the
right products for the challenge at hand.
• Greenheck has been Green for a long time! Our energy-saving products and
ongoing corporate commitment to sustainability can help you qualify for LEED
credits.
• Our 3D service allows you to download, at no charge, easy-to-use AutoDesk®
Revit® 3D drawings for many of our ventilation products.
Find out more about these special Greenheck services at greenheck.com

Our Commitment
As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specifications without notice.
Product warranties can be found online at Greenheck.com, either on the specific product page or in
the literature section of the website at Greenheck.com/Resources/Library/Literature. Prepared to Support
Green Building Efforts

00.CVI.1033 R5 7-2019 SP
P.O. Box 410 • Schofield, WI 54476-0410 • Phone (715) 359-6171 • greenheck.com Copyright © 2019 Greenheck Fan Corp.