Greenheck G User manual

March
2013
Centrifugal Roof Downblast Exhaust Fans
Models G and GB
• General Clean Air • Light Contaminants
• Seismic • High Wind • Variable Volume
Performance data now included.
®

Contents
Model Comparison......................3
Construction Features .................4-5
Emergency Smoke Control ...............6
Seismic ...............................6
High Wind & Hurricane...................7
Vari-Green®Motor and Controls.........8-9
Demand Control Ventilation...............9
Roof Curbs, Options, Accessories .....10-11
Typical Installations .................12-13
Model Number Code ...................13
PERFORMANCE AND DIMENSIONS:
Models G-060-095 ..................14-17
Models G-097-G203.................18-31
GB-071-200HP ..............18-32
Models GB-220-540 .................33-46
SPECIFICATIONS:
Vari-Green®Motors and Controls .....47
Direct Drive, Model G ...............48
High Wind & Hurricane, Seismic . . . 49
Belt Drive, Model GB................50
High Wind & Hurricane,
Seismic & Smoke Control ........51
Quick Build Programs ..................52
Our Commitment ......................52
Models G and GB
Spun Aluminum • Downblast
Centrifugal Roof Exhaust Fans
Codes and Certifications
Greenheck Fan Corporation certifies that the Models
G and GB fans shown herein are licensed to bear the
AMCA Seal. The ratings shown are based on tests
and procedures performed in accordance with AMCA
Publication 211 and Publication 311 and comply with the
requirements of the AMCA Certified Ratings Program.
The certified ratings for Models G and GB are shown on
pages 14 - 46.
G and GB models are listed for electrical
(UL/cUL 705) File no. E40001
GB models for Emergency Smoke Control Systems
(UL/cUL Listed for 500˚F (260˚C) for 4 hours and
1,000˚F (538˚C) for 15 minutes) File no. MH17511
High Wind Certification
Miami-Dade NOA No. 12-0120.13 for high wind
and hurricane zones
Seismic Certification
OSHPD No. 0148-10 - Office of Statewide Health
Planning and Development (California)
IBC 2009 and 2012 - International Building Code
*UL/cUL is optional
and must be specified

Models G and GB
Spun Aluminum • Downblast
Centrifugal Roof Exhaust Fans
Greenheck models G and GB centrifugal roof exhaust
fans provide the industry’s best performance and
durability for general clean air applications where air is
discharged downward, toward the roof surface.
• Broadest performance in the industry, up to
3.25in.wg (810 Pa) and 45,000 cfm (76,500 m3/hr).
• Most advanced motor cooling of any fan in its class.
• Performance as cataloged is assured. All fan sizes
are tested in our AMCA Accredited Laboratory, and
all models are licensed to bear the AMCA Sound and
Air Performance seals.
• UL Listed for electrical.
• Greenheck subjects these products to extensive life
testing, assuring you that the fans will provide years
of reliable performance.
Direct Drive, G
• Use for short and/or low resistance ductwork
Belt Drive, GB
• For average length and/or average
resistance ductwork
• High volume/average pressure
High Pressure, GB-HP and G-HP
• For long and/or high resistance ductwork
• Low volume/high pressure
3
Model Comparison
Model
Location Mounting Airflow Application Drive
Type Impeller Type Performance
Relative Cost Outdoor Indoor Roof Curb Base/Floor Hanging Wall Ceiling Mounted Exhaust Supply Reversible Recirculate General/Clean Air Contaminated Air Spark Resistant Grease (UL 762) Smoke Control (UL)* High Wind** Continuous High Temp (above 200°F) Belt Direct Centrifugal Propeller/Axial Mixed Flow Maximum Volume (cfm) Maximum Static Pressure (in. wg)
G99 9 99999 6,308 1.75 $
GB 99 9 999999 44,700 3.25 $
* Smoke Control available on models: 101, 101HP, 121, 131, 141, 141HP, 161, 161HP, 200, 240, 300, 360, 420 and 480.
** High wind limited to sizes 300 and smaller

Construction Features
Models G and GB
4
Standard Construction Features
Wheel
An aluminum, backward-inclined, non-overloading centrifugal wheel is utilized to
generate high-efficiency and minimal sound. Wheel cones are carefully matched to the
venturi for maximum efficiency. Each wheel is robotically welded and statically and
dynamically balanced for long life and quiet operation.
Disconnect
Switch
NEMA-1 switch is factory mounted and wiring is provided from the motor as standard
(other switches are available). All wiring and electrical components comply with the
National Electrical Code®(NEC) and are either UL Listed or Recognized.
Fan Shaft
Precisely sized, ground and polished so the first critical speed is at least 25% over
the maximum operating speed. Where the shaft makes contact with bearings, tight
tolerances result in longer bearing life.
Bearings 100% factory tested and designed specifically for air handling applications with a
minimum L10 life in excess of 100,000 hours (L
50 life of 500,000 hours).
Motor Carefully matched to the fan load and is mounted out of the airstream.
Motor Cover Constructed of aluminum and attached with fasteners that provide for easy removal and
access to motor compartment and drive assembly.
Motor Cooling
Cooling fins located on top of the fan wheel draw outside air through a large space
between the fan shroud and the motor cover directly into the motor compartment.
Positive motor cooling with fresh air results in maximum motor life.
Lifting Points Various lifting points are located on the drive frame and bearing plate (on select sizes).
True Vibration
Isolation
Vibration isolators, with no metal-to-metal contact, support the drive assembly and
wheel for long life and quiet operation.
Drive Assembly Belts, pulleys, and keys are oversized 150% of driven horsepower. Machined cast
pulleys are adjustable for final system balancing. Belts are static-free and oil-resistant.
Lower Windband Heavy-gauge aluminum with formed edges for added strength and provides
weather resistance.
Curb Cap Curb cap (with integral deep spun venturi) is constructed of aluminum and is one-piece for
a weather-tight fit.
Internal Conduit
Chase
A large diameter conduit for installing electrical wiring through the curb cap into the
motor compartment.
Nameplate Permanent stamped aluminum plate for exact model and serial number identification.
Galvanized
Birdscreen Rigid wire protects the fan discharge from birds and small objects.
Fan Shroud One-piece, heavy-gauge aluminum with a rolled bead for extra strength directs exhaust
air downward.
Mounting Holes Curb cap has prepunched mounting holes to ensure correct attachment to the roof.
6
1
2
3
4
5
7
8
9
10
11
12
13
14
15
16
17
High Wind Construction Features
Internal Supports Heavy-gauge supports and bracing are added for additional strength to withstand
a load of 75 psf.
Reinforced
Wind Band High wind fans include additional reinforcement for maximum strength.
Roof Curb
(page 10)
High wind-load fans are certified for use with Greenheck model GPFHL, GPFHD, GPF or
equivalent in high wind applications. Roof curbs ship separate for field installation with
attachment details provided.
18
19

5
Construction Features
Models G and GB
8
8
DRIVE FRAME
(BELT DRIVE)
MODEL G
DIRECT DRIVE
15
12
11
7
6
5
1
14
18
17
16
9
8
4
3
2
19
10
MODEL GB
BELT DRIVE
13
6

With changes in building codes and standards, more equipment is being
required to be seismically certified in areas of the country not commonly
thought of as being in seismically active zones.
The International Building Code (IBC) is designed to provide model
code regulations that safeguard public health and safety in all U.S.
communities. This code is intended to improve the performance and
design of non-structural systems subject to seismic events.
The State of California, one of the most active seismic areas in the United
States, has the Office of Statewide Health Planning and Development
(OSHPD) to regulate the design and construction of healthcare facilities
to ensure they are safe and capable of providing
services to the public after a seismic event.
OSHPD developed their own unique certification
process to incorporate the IBC and ASCE
testing standards to ensure equipment remains
operable after a seismic event.
Note: All G and GB models meet seismic
requirements.
Applications
G and GB models
6
Seismic
Testing Criteria
All Greenheck seismically certified models have been tested using the most severe seismic event that is
found on the Spectral Response Map per IBC Figures 1613.5 (1-2). Our testing is performed under the
worst case scenario using the highest mapped seismic load, highest level occupancy category, worst
case site class, and highest code mandated importance factor, thereby allowing Greenheck’s seismically
certified fans to be used anywhere in the United States under any conditions
California OSHPD
Test Protocols
The California Office of Statewide Health Planning and Development (OSHPD) requires all certified
models be shake table tested in accordance with ICC ES AC-156, in which the fans are physically
subjected to the same or greater forces than they will see during a seismic event. Subjecting
Greenheck model G and GB fans to this type of testing ensures the fans will operate without
problems after a seismic event.
OSHPD Certification
No. 0148-10
The OSHPD certification numbers and supporting documents can be viewed on OSHPD’s
website ensuring that the fan has been subjected to and passed rigorous testing standards.
State Licensed
P.E. Calculations
When using the fans in applications which are not covered by California OSHPD standards, Greenheck
models G and GB have been certified by a third party engineering firm to IBC 2009, 2012 and ASCE
7-05 standards. These engineers hold professional engineering (P.E.) licenses in all 50 states, so no
matter where your job is located, you are backed by a P.E. signature for your state.
Certified
Independent
Third-Party Testing
All Greenheck seismically certified fan models have gone through extensive testing procedures.
Greenheck models G and GB have been certified to IBC 2009, 2012, ASCE 7-05 and California OSHPD
standards through both engineering calculations and shake table testing of all models by independent
third party engineering firms.
Seismic - G and GB
Protocols designed for seismic standards:
to ens
ser
O
p
t
o
s
When you buy a Greenheck
model GB with the smoke
control option, you receive a
fan with the industry’s best
performance and durability for
smoke control applications
(as found in emergency smoke
control systems).
• UL/cUL Listed for 500°F (260°C) for 4 hours and
1,000°F (538°C) for 15 minutes.
• Half the weight of traditional smoke control fans,
ideal choice for roof load concerns.
• Low profile, height is less than half of traditional
smoke control fans, maximum of 521⁄2inches
(1334 mm) from curb cap to top of fan.
• Multiple applications, capable of exhausting
general clean air and satisfying emergency smoke
control regulations.
Emergency Smoke Control - GB
GB smoke control models are:
101, 101-HP, 121, 131, 141, 141-HP,
161, 161-HP, 200, 240, 300, 360,
420, 480

7
High Wind and Hurricane - G and GB
Greenheck is leading the High Wind Standard for roof top fans and
ventilators. Forceful winds and wind-borne debris are the cause of most
hurricane damage. Hurricane winds start at 75mph. and can exert a
force of 75poundspersquarefoot of pressure—or over 900pounds
on a fan and curb. Forceful winds are not the only problem, wind-borne
debris can also cause detrimental effects to objects and structures.
High winds and extreme forces are the cause of most storm damage.
By analyzing calculations, computer simulations, actual testing, and
other standards—Greenheck developed the High Wind Standard.
Structural
Performance Load
A static load that is 1.5times the design load (91.5 pounds per square foot of pressure) is applied both
positively and negatively to simulate wind force loads in each direction. Structural Performance per
Dade County Protocol TAS-202 (ASTM-E330).
Miami-Dade County
Test Protocols
Greenheck worked with Miami-Dade County to outline a High Velocity Hurricane Zone standard for
rooftop fans. Greenheck model USGF was the first rooftop fan certified and approved by the Miami-
Dade Building Code Compliance office and Texas Department of Insurance for use in hurricane zones.
Models G and GB have been certified by an independent third party to the ASTM E-330 Static Pressure
Difference Standard, Florida Building Code Test Protocol TAS-201 (large missile impact), 202 (static
pressure difference) and 203 (cyclic pressure) Static Pressure Difference.
Miami-Dade NOA
Numbers
The certifications can be viewed on the Miami-Dade County website under the NOA numbers listed here.
Models G and GB are the first downblast aluminum fans in the industry that have received a Miami-Dade
NOA for high wind and hurricane zones. Miami-Dade NOA 12-0120.13 for models
G and GB.
Florida Product
Approval
Florida Product Approval ensures that products which have been approved can be used anywhere in
the State of Florida which are not governed by the Miami-Dade County high wind regulations. More
information can be found on the Florida Building Code website. Florida Product Approval FL13225.1
for models G and GB
State Licensed
P.E. Calculations
Structural calculations performed by a licensed Professional Engineer (P.E.) on models G and GB
include Finite Element Analysis (FEA) and a stamped P.E. report of the fans compliance to ASCE 7-05
Minimum Design Loads for Buildings and Other Structures Standard and the Florida Building Code. The
ASCE 7-05 Standard meets the IBC, Florida and Miami-Dade codes.
Computational Fluid
Dynamics (CFD)
All Greenheck high wind models have been analyzed using Computational Fluid Dynamics (CFD).
CFD is computer software designed to simulate the flow of high speed winds over the surface of
objects. The software records the force profile exerted on the fan so it can be utilized
in Finite Element Analysis (FEA).
Finite Element
Analysis (FEA)
Utilizing the results from CFD analysis, Greenheck can accurately predict the stress, strain,
and deflection resulting from high wind loads. Greenheck high wind units have been proven
to withstand high winds through Finite Element Analysis utilizing CFD results.
Protocols designed
to protect against wind-borne
debris and severe wind-loads:
U.S. continent
averaged
tornado frequency.
Atlantic, Gulf and Pacific history of major hurricane tracks.
Applications
G and GB models
U.S. continent
ed

8
Vari-Green®Motor Option
Model G
Greenheck’s electronically commutated (EC)
Vari-Green (VG) motor combines motor
technology, controllability and energy-efficiency
into one single low maintenance unit and is the
industry’s first fully controllable motor. When combined
with Greenheck’s G fans, all the CFM and static
pressure ranges of a belt drive can be attained with the
benefits of a direct drive.
Benefits
Operates on AC power that’s converted to DC—
providing a more efficient motor operation as compared
to an AC operation.
• The motor can attain up to 85% efficiency and
reduce energy consumption.
• Watt savings of 30-70% depending on RPM.
Note: As motor speed is turned down, efficiency stays high
as compared to an AC motor that decreases dramatically.
• Operates cooler than a standard AC motor at lower
RPMs. A cooler motor has longer motor life and
reduces energy consumption.
• 80% usable RPM turndown versus 30%, see Motor
Turndown Comparison chart at right.
• G fans with Vari-Green motors can provide all the
CFM and static pressure ranges of a comparable
belt drive.
• Maintenance costs are reduced as there are
no belts or bearings to replace and no pulleys
to adjust.
• Direct drive fans are often preferred where
maintenance access is difficult.
• Provides a solution for demand controlled ventilation
applications.
Vari-Green Advantages
• Initial cost is similar to a belt drive
• Lower operating cost
• No maintenance, no belts, pulleys or bearings
• Easy RPM adjustment
8
600
500
400
300
200
100
0
0 350
50% 75% 100%
1750
FAN SPEED (RPM)
INPUT POWER (WATTS)
Energy
Savings
G-123
with PSC
Not recommended
GB-123
Single Phase*
G-123 with
*GB is a belt driven fan
E
E
S
S
The length of each curve indicates the practical turndown range.
Data is for 1/2 hp motors with load of 0.35 Bhp at full speed
Motor Turndown Comparison
Features
1. Dial on Motor Control - a potentiometer (dial on
motor control) is mounted on the motor for easy
speed adjustment for system balance. Simply turn
the dial. There are no belts and pulleys to adjust.
2. Control Wire Inputs - the motor accepts a
0-10V DC signal from Building Automated
Systems or other controls to adjust
motor speed.
12 1
®
Comparisons: Belt, Direct Drive with PSC
and Direct Drive with Vari-Green
Analysis is based on operating costs for a period of three years where
the fans operate continuously at 1725 rpm, 24/7, with an energy rate
of $0.10/kWh. Maintenance on the GB-121 is estimated at $65/yr.
Note: Example is based on a relative cost. Use and installation
variables may produce different results.
$2,000
1,750
1,500
1,250
1,000
750
500
250
$0
CUBE-
121
Three Year Cost Comparison
Initial Cost
Maintenance cost over three years
Operating cost over three years
CUE-
121-A5
CUE-
121-VG
Constant Volume Life Cycle Analysis
GB-
121 G- 123-A5 G- 123-VG
Motor Information
HP RPM Volts Phase FLA Enclosure
1/6 1725 115 Single 3.1 TENV
1/4 1725 115 Single 3.9 ODP
1/2 1725 115 Single 6.2 ODP
1/2 2500 115 Single 6.5 ODP
3/4 1725 115 Single 10.1 ODP
3/4 2200 115 Single 11.3 ODP
1 1725 115 Single 12.4 ODP
1 1725 115/208-230 Single
12.0/6.0 TEFC
2 1725 208-230 Single 12.0 TEFC

9
Vari-Green® Control Options
9
$$$$$$$$$$$$$$$$$$$$$$$$
$$$$$$$$$$$$$$$$$$$$$$$$
$$$$$$$$$$$$$$$$$$$$$$$$
$$$$$$$$$$$$$$$$$$$$$$$$
$$$$$$$$$$$$$$$$$$$$$$$$
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
100
80
60
40
20
0%
Time of Day
Hypothetical (Hotel Bathroom)
Variable Volume - Load Shape
% of Operation
Series 1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
100
80
60
40
20
0%
Time of Day
Constant Volume - Load Shape
% of Operation
Series 2
Demand-controlled ventilation offers significant energy savings by
exhausting only the necessary amount of air throughout the day.
Demand Control Ventilation for
Multistory Buildings
Applications requiring constant pressure or variable
volume can utilize G fans with Vari-Green motors
and Vari-Green controls.
Demand control
ventilation systems
reduce the amount
of energy used by
decreasing the speed of
the fan when demand
is low. This in turn
lessens the amount
of conditioned air
exhausted and further
reduces total operating
costs associated with
air conditioning and
heating in multistoried
buildings such as hotels,
multifamily complexes,
institutional facilities,
and high rise commercial
buildings.
$2,000
1,750
1,500
1,250
1,000
750
500
250
$0
Variable
Volume
Variable Volume vs. Constant Volume
Heating Cost
Cooling Cost
Fan Operating Cost
Constant
Volume
Example of potential savings
based on a northeast city in
the USA using Vari-Green
components for variable volume.
Variable Volume
Operating Cost Analysis
Vari-Green®Controls
Transformer -Provides 24V power from the existing
line voltage at the fan to the Vari-Green motor and
controls. Dual voltage primary (120/240V) transformer
provided with the fan.
Remote Dial - Allows for remote, manual airflow
adjustments. Wall plate with dial may be mounted in a
standard 2x4 inch electrical junction box.
Two Speed Control with Integral Transformer
Control allows motor rpm to be set at two
independent speeds (high or low). Meets minimum
airflow requirements with the ability to bump up
to high speed in an emergency or meet maximum
airflow requirements, or reset down to low for energy
conservation.
Constant Pressure Control - Indoor - Control Vari-
Green motor via static (variable volume) or velocity
(constant CFM) pressure on the inlet or outlet side of
the fan. Optional one or two duct or room probes for
use in:
• Multifamily structures - Apartments, condos, hotels;
clothes dryers, residential kitchens and bathrooms.
• Institutional facilities - Schools, prisons,
multistory office buildings; bathrooms.
Constant Pressure Control - Outdoor
Control a Vari-Green motor via static pressure on the inlet
side of the fan. Includes one duct probe and transducer
for use in:
• Multifamily structures - Apartments, condos, hotels;
residential kitchen, dryer facilities and bathrooms.
• Institutional facilities - Schools, prisons, multistory.
Air Quality – VOC - Control a Vari-Green motor via
changes in volatile organic compounds (VOC’s).
VOC’s are gasses that are emitted from humans, building
materials, perfumes, foods, and furniture
off-gassing. Range is 0-2000 CO2PPM equivalent.
• Institutional facilities – Schools, court house, hospitals;
bathrooms, waiting rooms, cafeteria.
• Commercial buildings – Office space, conference
rooms, bathrooms, break room.
Air Quality – Temperature and Humidity -Control
Vari-Green motor via changes in temperature, humidity,
or both. Range is 32 to 120°F and 0 to 100% relative
humidity.
• Multifamily structures - Apartments, condos, hotels;
bathrooms, utility rooms.
• Commercial buildings - Office buildings, office space,
conference rooms, utility rooms, bathrooms.
The Vari-Green constant pressure control is preprogramed
and easy to install for applications that include venting
dryers, bathrooms, residential type kitchen space or
industrial process exhaust.
Contact [email protected] for more information.
Daily Operating Comparison:
Variable Volume and Constant Volume
Note: A standard VFD compatible motor can also function within a
Variable Volume system.

Options and Accessories
10
Roof Curbs
Prefabricated roof curbs reduce installation time and
costs by ensuring compatibility between the fan, the
curb and roof opening. All curbs are insulated with
fiberglass. A wide variety of roof curbs are available,
including: flanged, pitched and sound-absorbing.
Hinged Curb Cap with Cables (Field Installed)
Mounted to the curb cap, allows entire fan to tilt away
from curb for access to wheel and ductwork. Includes
restraint cables.
Hinged Base
(Factory Mounted)
Allows for easy
maintenance. Hinge and
restraining cables are
factory mounted to a
subbase attached directly
to curb without additional
height added.
Curb Seal
Rubber seal between fan and curb to assure proper
sealing when attached to a curb.
Curb Extensions
Extensions raise
the fan discharge
above the roofline
and provide an
accessible mounting
location for dampers.
Insect screen bases, constructed
with a removable fine mesh, are recommended for
applications where insect entry must be prevented.
High Wind and Severe Duty Roof Curbs
GPF/GPFP/GPFR – Approved for high wind
applications up to a 75 psf wind-load rating.
Constructed of 18 gauge steel, formed and welded
sides, and a 5-inch flashing flange. GPF is available
up to 42 inches in height. GPFP and GPFR are
available up to 24 inches in height.
Severe Duty Curbs – Designed for heavy
compression loads exceeding 1,000 lbs. and carry a
130 psf wind-load rating.
GPFHL (Heavy Load) - 14 gauge galvanized steel
with internal vertical support members and a 5-inch
flashing flange.
GPFHD (Heavy Duty) - 12 gauge galvanized steel
with internal vertical support members and a double
thick 5-inch flashing flange.
GPFHL and HD are available up to 24 inches in
height. Note: Maximum 24 inch height restriction on
all curb models certified for high wind.
For detailed curb information refer to Roof Curbs,
Extensions and Equipment Supports catalog.
Mounting details for the roof curb to the roof
substrate and the fan to the curb are included with
each model G and GB installation manual.
For additional severe duty information, refer to the
Greenheck High Wind brochure.
Tie-Down Points
Four brackets located on
the shroud for securing
the fan in high wind
applications. Cables and
anchors by others.

11
Birdscreen
Galvanized mesh is standard,
optional aluminum or stainless
steel rigid wire are also available.
Coatings
A wide variety of coatings and colors are available.
Greenheck coatings and resistance charts can be
found in the Performance Coatings Commercial
and Industrial Fans catalog and in our Product
Application Guide—Performance Coatings for
Ventilation Products.
Primer is applied at the factory to allow
for final finish in the field.
Permatector™ is our standard coating.
Typically used for applications that
require corrosion resistance in indoor
and outdoor environments.
Hi-Pro Polyester is resistant to salt
water, chemical fumes and moisture
in more corrosive atmospheres.
Typically used for applications that
require superior chemical resistance,
excellent abrasion and outdoor UV
protection. This coating exceeds
protective qualities of Air Dried Heresite
and Air Dry Phenolic.
Baked Enamel Decorative Coatings
are heat cured enamels applied either
as wet paints or electrostatic powders.
Customers can choose from 16 standard
decorative colors or color match any
color.
Speed Controllers for
Standard Motors
Available for use with shaded
pole and permanent split
capacitor (PSC) open motors
on model G fans. They provide
an economical means of system
balancing with direct drive fans.
Disconnect Switches
A wide selection of NEMA rated
switches are available for positive
electrical shutoff and safety,
including: dust-tight, rainproof,
and corrosion-resistant.
Switches may be internally
or externally mounted.
Dampers
Designed to prevent
outside air from entering
back into the building
when fan is off. Includes
gravity and motorized
dampers. Damper sizes
are shown on each
performance data page.
Motor Starters -
The fundamental
function of a motor
starter is to protect the
motor from damage
that can occur from
overheating. With
a Greenheck motor
starter you will be
provided with the
best motor protection
available.
Specific model components may include;
SmartStart™ technology, physical interface, overload
protection, disconnect, magnetic contactor, NEMA-1
or NEMA-3R steel enclosures and pre-engineered
easy system integration. For complete information on
specific Greenheck Motor Starter models refer to
greenheck.com, Motor Starter page.
Options and Accessories
G and GB models are Listed for electrical
(UL/cUL705) File no. E40001
GB models for Emergency Smoke Control Systems
(UL/cUL Listed for 500˚F (260˚C) for 4 hours and
1,000˚F (538˚C) for 15 minutes) File no. MH17511
Note: UL/cUL is optional and must be specified.
PERMATECTORTM
HI-PRO
POLYESTER
PRIMER

12
Typical Installations
Models G and GB
Note: The typical installations shown are recommendations
based on national codes. Local authority may supersede these
recommendations.
General Clean Air (figure 1)
Models G and GB exhaust fans are designed to
meet the needs of general clean air applications.
Tests were conducted to assure safe, rugged and
reliable fans.
Due to the varying types of airstreams encountered
in commercial ventilation, system designers must
be aware of national, state, and local codes and
guidelines governing these installations. Local code
authorities should be consulted before proceeding
with any ventilation project.
• When roofing materials extend to the top of the
curb, roof curbs should be 11⁄2inches (3⁄4inch on
each side) less than the unit curb cap to allow for
roofing and flashing.
• For recommended duct size, damper size, and
roof opening dimensions, refer to the performance
data pages. (starting on pg. 14)
• Installation must include a means for inspecting,
cleaning and servicing the exhaust fan.
High Wind, Hurricane and Seismic (figure 2)
• Roofing materials can extend to the top of the
curb, roof curbs should be 1 inch (25 mm) total,
or 1⁄2inch (13 mm) on each side, less than the unit
curb cap to allow for roofing and flashing.
Recommended
Duct and
Damper Size
Recommended
Roof Opening
11/4in.
(32 mm)
3/4 in.
(19 mm)
Factory Wired
from Motor to
Disconnect
Wiring by
Others
8 or 12 in.
(203 or 305 mm)
Damper
11/4in.
(32 mm)
Recommended
Duct and
Damper Size
Recommended
Roof Opening
11/4in. (32 mm)
1/2 in. (13 mm)
Wiring by
Others
8 - 24 in.
(203 - 610 mm)
GPF or SD Curb
Damper
11/4in. (32 mm)
1/4 in. (6 mm)
Fastener
4 in. (102 mm)
From Curb Edge
Wheel Rotation
Direction of rotation is very critical. Rotation in the wrong direction will result in
excessive horsepower, possible motor burnout, and increased noise levels.
Check rotation by energizing the unit momentarily. The rotation should be the same
as the rotation decals affixed to the unit and is clockwise when viewed from the top
of the unit.
Clockwise
figure 1
figure 2

13
VG = Vari-Green®
(Direct Drive only)
Motor HP (Belt Drive only)
6= 1/6 10 = 1 50 = 5
4= 1/4 15 = 1½ 75 = 7½
3= 1/3 20 = 2 100 = 10
5= 1/2 30 = 3 150 = 15
7= 3/4
Motor RPM (Direct Drive only)
A= 1725 D= 1550
B= 1140 E= 1050
C= 860 G= 1300
International
(See CAPS for performance)
K= 950 RPM J= 1475 RPM
Fan Inlet Connections
In order to assure proper fan performance, caution
must be exercised in fan placement and connection
to the ventilation system. Obstructions, transitions,
poorly designed elbows, improperly selected
dampers, etc., can cause reduced performance,
excessive noise, and increased mechanical stress.
For performance to be as published, the system must
provide uniform and stable airflow into the fan.
Provide uniform airflow at fan inlet to assure
optimum performance.
Provide uniform airflow at fan inlet and through
the damper to assure optimum performance.
Dampers must open fully. Use motorized
dampers in low airflow applications to
reduce losses.
Avoid sharp turns or entrance conditions which
cause uneven flow. Use turning vanes in elbows
to reduce adverse effects.
Typical Installations
Models G and GB
Good
Good
Poor
Poor
A
CD
B
Model Number Code
The model number code system is designed to completely identify the fan. The correct code letters
must be specified to designate belt or direct drive. The remainder of the model code is determined by
the size and performance.
A
C
D
B
Fan Size
060 through 540
Wheel Pressure Level
HP - High Pressure
GB - 240 HP - VG/5/A - X
Configuration
G- Direct Drive
GB - Belt Drive
X= UL 705
F= UL Smoke
Control Systems

0 100 200 300 400 500 600
0
20
40
60
80
100
120
140
0 60 120 180 240 300 360
0.0
0.1
0.2
0.3
0.4
0.5
0.6
065-VG
065-D
065-G
065-E
060-VG
060-D
060-G
060-E
Static Pressure (in. wg)
Volume (cfm)
Volume (m 3/hr)
Static Pressure (Pa)
RPM (Direct)
RPM (Vari-Green)
Density 0.075 lb/ft3
Density 1.2 kg/m3
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
14
Roof Downblast - Exhaust
Direct Drive
G-060 • G-065
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
Damper Size = 8 x 8 (203 x 203)
Roof Opening = 10½ x 10½ (267 x 267)
Shroud Thickness = 0.064 (1.6)
Motor Cover Thickness = 0.040 (1.0)
Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight = 15 lbs. (7 kg)
All dimensions in inches (millimeters). *May be greater depending on motor.
^Weight shown is largest cataloged Open Drip-Proof motor.
Direct
Drive
Motor
HP
Fan
RPM
Static Pressure in Inches wg
0 0.05 0.1 0.125 0.15 0.2 0.25 0.3 0.375 0.4
060
VG-
1/6 E-1/200 1050
CFM 138 116 90 73 53
BHP 0.00 0.00 0.01 0.01 0.01
Sones 1.7 1.7 1.7 1.7 1.7
G-1/100 1300
CFM 170 153 135 125 113 85
BHP 0.01 0.01 0.01 0.01 0.01 0.01
Sones 2.9 2.8 2.8 2.7 2.7 2.6
D-1/60 1550
CFM 203 188 173 166 158 140 120 92
BHP 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.02
Sones 4.3 3.9 3.8 3.8 3.8 3.7 3.7 3.6
1725
CFM 226 213 199 193 186 173 155 137 101 89
BHP 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02
Sones 5.4 4.9 4.9 4.8 4.8 4.8 4.7 4.6 4.5 4.4
065
VG-
1/6 E-1/100 1050
CFM 187 161 130 110 87
BHP 0.01 0.01 0.01 0.01 0.01
Sones 2.2 2.1 1.9 1.8 1.7
G-1/60 1300
CFM 231 211 189 178 163 130 92
BHP 0.01 0.01 0.01 0.01 0.01 0.01 0.01
Sones 3.2 3.1 3 2.9 2.9 2.8 2.7
D-1/30 1550
CFM 276 259 241 232 223 201 176 145 96
BHP 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02
Sones 4.9 4.6 4.5 4.5 4.4 4.3 4.3 4.1 4
1725
CFM 307 292 276 268 260 243 223 201 160 146
BHP 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03
Sones 6.4 5.8 5.8 5.8 5.8 5.8 5.7 5.7 5.7 5.7
E-1050-RPM G-1300-RPM D-1550-RPM
13⁄4(44)
193⁄8
(492)
*121⁄8
(308)
17
(432)
3 (76)
Direct Drive RPM

15
0 200 400 600 800
0
20
40
60
80
100
120
140
0 90 180 270 360 450 540
0.0
0.1
0.2
0.3
0.4
0.5
0.6
075-VG
075-D
075-G
075-E
070-VG
070-D
070-G
070-E
Static Pressure (in. wg)
Volume (cfm)
Volume (m 3/hr)
Static Pressure (Pa)
RPM (Direct)
RPM (Vari-Green)
Density 0.075 lb/ft3
Density 1.2 kg/m3
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
Damper Size = 8 x 8 (203 x 203)
Roof Opening = 10½ x 10½ (267 x 267)
Shroud Thickness = 0.064 (1.6)
Motor Cover Thickness = 0.040 (1.0)
Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight = 15 lbs. (7 kg)
All dimensions in inches (millimeters). *May be greater depending on motor.
^Weight shown is largest cataloged Open Drip-Proof motor.
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
Roof Downblast - Exhaust
Direct Drive
G-070 • G-075
E-1050-RPM G-1300-RPM D-1550-RPM
13⁄4(44)
193⁄8
(492)
*121⁄8
(308)
17
(432)
3 (76)
Direct Drive RPM
Direct
Drive
Motor
HP
Fan
RPM
Static Pressure in Inches wg
0 0.05 0.1 0.125 0.15 0.2 0.25 0.3 0.375 0.4
070
VG-
1/6 E-1/100 1050
CFM 253 226 195 179 152
BHP 0.01 0.01 0.01 0.01 0.01
Sones 2.7 2.1 1.7 1.5 1.2
G-1/60 1300
CFM 314 292 269 257 244 214 171
BHP 0.01 0.01 0.02 0.02 0.02 0.02 0.02
Sones 4.1 3.7 3.4 3.3 3.2 2.9 2.6
D-1/30 1550
CFM 374 356 337 327 317 297 274 244 190
BHP 0.02 0.02 0.02 0.03 0.03 0.03 0.03 0.03 0.03
Sones 5.6 5.4 5.2 5.1 5.1 4.9 4.7 4.5 4.1
1725
CFM 416 400 383 375 366 348 329 309 270 253
BHP 0.03 0.03 0.03 0.03 0.03 0.04 0.04 0.04 0.04 0.04
Sones 6.8 6.7 6.7 6.6 6.6 6.5 6.3 6.2 5.9 5.7
075
VG-
1/6 E-1/80 1050
CFM 297 260 222 200 176
BHP 0.01 0.01 0.01 0.01 0.01
Sones 3.6 3.1 2.9 2.8 2.6
G-1/50 1300
CFM 367 338 309 293 277 241 195
BHP 0.02 0.02 0.02 0.02 0.02 0.02 0.02
Sones 4.1 3.9 3.7 3.7 3.7 3.6 3.5
D-1/25 1550
CFM 438 413 389 377 364 337 309 277 214
BHP 0.03 0.03 0.03 0.04 0.04 0.04 0.04 0.04 0.03
Sones 6.1 5.8 5.6 5.4 5.3 5.1 4.9 4.9 4.8
1725
CFM 487 465 443 432 421 399 374 349 306 292
BHP 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05
Sones 8.0 7.5 7.2 7.1 6.8 6.5 6.2 6.1 6.0 6.0

0 100 200 300 400 500 600 700 800 900 1000
0
20
40
60
80
100
120
140
160
180
200
220
0 100 200 300 400 500 600
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
085-E
085-G
085-D
085-VG
080-VG
080-D
080-G
080-E
RPM (Direct Drive)
RPM (Vari Green)
Density 0.075 lb/ft3
Static Pressure (in. wg)
Volume (cfm)
m3/hr
Static Pressure (Pa)
Volume ( )
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
Density 1.2 kg/m3
16
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
Damper Size = 10 x 10 (254 x 254)
Roof Opening = 12½ x 12½ (318 x 318)
Shroud Thickness = 0.064 (1.6)
Motor Cover Thickness = 0.040 (1.0)
Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight = 19 lbs. (9 kg)
All dimensions in inches (millimeters). *May be greater depending on motor.
^Weight shown is largest cataloged Open Drip-Proof motor.
Roof Downblast - Exhaust
Direct Drive
G-080 • G-085
Direct
Drive
Motor
HP
Fan
RPM
Static Pressure in Inches wg
0 0.1 0.125 0.15 0.2 0.25 0.3 0.375 0.5 0.625
080
VG-
1/6 or
1/4
E-1/40 1050
CFM 335 268 249 230 189 134
BHP 0.01 0.02 0.02 0.02 0.02 0.02
Sones 3.8 3.7 3.6 3.7 3.9 4.2
G-1/30 1300
CFM 415 361 348 333 303 272 239 174
BHP 0.02 0.03 0.03 0.03 0.03 0.03 0.03 0.03
Sones 5.4 5.4 5.4 5.4 5.4 5.5 5.6 5.9
D-1/20 1550
CFM 495 450 439 427 404 379 354 314 237
BHP 0.04 0.04 0.04 0.05 0.05 0.05 0.05 0.06 0.06
Sones 7.3 7.3 7.3 7.3 7.3 7.2 7.3 7.3 7.6
1725
CFM 551 511 501 490 469 449 426 392 332 260
BHP 0.05 0.06 0.06 0.06 0.06 0.07 0.07 0.07 0.08 0.08
Sones 9.1 9.1 9.1 9.1 9 8.9 8.9 8.9 9.1 9.4
085
VG-
1/6 or
1/4
E-1/40 1050
CFM 398 326 307 286 240 179
BHP 0.01 0.02 0.02 0.02 0.02 0.02
Sones 4 3.9 3.9 3.9 4.1 4.3
G-1/30 1300
CFM 493 436 420 405 375 340 302 233
BHP 0.02 0.03 0.03 0.03 0.03 0.04 0.04 0.04
Sones 5.5 5.3 5.3 5.3 5.3 5.3 5.4 5.5
D-1/20 1550
CFM 588 541 528 515 490 464 439 394 308 168
BHP 0.04 0.04 0.05 0.05 0.05 0.05 0.06 0.06 0.06 0.06
Sones 7.6 7.4 7.4 7.4 7.4 7.4 7.4 7.4 7.6 8.1
1725
CFM 654 612 602 590 567 544 521 486 419 340
BHP 0.05 0.06 0.06 0.06 0.07 0.07 0.07 0.08 0.08 0.09
Sones 9.5 9.4 9.4 9.3 9.3 9.3 9.3 9.3 9.4 9.4
E-1050-RPM G-1300-RPM D-1550-RPM VG-1725-RPM
13⁄4(44)
213⁄4
(552)
*145⁄8
(371)
17
(432)
4 (102)
Direct Drive RPM

0 500 1000 1500 2000
0
50
100
150
200
0 200 400 600 800 1000 1200
0.0
0.2
0.4
0.6
0.8
1.0
095-E
095-G
095-D
095-VG
090-VG
090-D
090-G
090-E
RPM
RPM (Vari Green)
Density 0.075 lb/ft3
Static Pressure (in. wg)
Volume (cfm)
Volume ( )
Static Pressure (Pa)
m3 /hr
D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
Density 1.2 kg/m3
17
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
Direct
Drive
Motor
HP
Fan
RPM
Static Pressure in Inches wg
0 0.1 0.125 0.15 0.2 0.25 0.3 0.375 0.5 0.625
090
VG-
1/6 or
1/4
E-1/40 1050
CFM 520 441 420 398 351 293
BHP 0.01 0.02 0.02 0.02 0.02 0.02
Sones 4 3.9 3.9 4 4.1 4.2
G-1/25 1300
CFM 644 580 565 549 515 478 440 373
BHP 0.03 0.03 0.04 0.04 0.04 0.04 0.04 0.05
Sones 5.4 5.4 5.4 5.4 5.4 5.5 5.5 5.6
D-1/15 1550
CFM 768 714 701 688 662 633 605 557 473 338
BHP 0.05 0.05 0.06 0.06 0.06 0.06 0.07 0.07 0.08 0.07
Sones 7.6 7.5 7.5 7.5 7.5 7.4 7.4 7.4 7.4 7.8
1725
CFM 855 806 794 782 759 735 709 671 600 522
BHP 0.06 0.07 0.07 0.08 0.08 0.08 0.09 0.09 0.10 0.11
Sones 9.7 9.5 9.5 9.5 9.5 9.4 9.4 9.2 9.1 9.1
095
VG-
1/6 or
1/4
E-1/30 1050
CFM 717 606 570 534 468 389 290
BHP 0.03 0.03 0.04 0.04 0.04 0.04 0.03
Sones 5.4 4.5 4.5 4.5 4.4 4.5 4.6
G-1/12 1300
CFM 888 802 780 754 695 640 586 493 184
BHP 0.06 0.06 0.06 0.06 0.07 0.07 0.07 0.07 0.05
Sones 7.6 6.8 6.7 6.6 6.5 6.4 6.4 6.4 6.8
D-1/8 1550
CFM 1059 987 969 950 912 863 814 745 623 474
BHP 0.10 0.10 0.10 0.11 0.11 0.11 0.11 0.12 0.12 0.11
Sones 9.6 9.4 9.3 9.2 9 8.8 8.7 8.7 8.7 8.7
1725
CFM 1179 1114 1098 1081 1048 1013 969 903 800 688
BHP 0.13 0.14 0.14 0.14 0.15 0.15 0.15 0.16 0.16 0.16
Sones 11.4 11.4 11.4 11.5 11.4 11.2 11 10.9 11.3 11.3
E-1050-RPM G-1300-RPM D-1550-RPM VG-1725-RPM
Damper Size = 10 x 10 (254 x 254)
Roof Opening = 12½ x 12½ (318 x 318)
Shroud Thickness = 0.064 (1.6)
Motor Cover Thickness = 0.040 (1.0)
Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight = 22 lbs. (10 kg)
All dimensions in inches (millimeters). *May be greater depending on motor.
^Weight shown is largest cataloged Open Drip-Proof motor.
Roof Downblast - Exhaust
Direct Drive
G-090 • G-095
13⁄4(44)
213⁄4
(552)
*145⁄8
(371)
17
(432)
4 (102)
Direct Drive RPM

0 100 200 300 400 500 600
0
50
100
150
200
250
300
0 50 100 150 200 250 300 350 400
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
097-C
097-B
1/8 HP
1/4 HP
1/6 HP
1725
1435
1140
860
720
Static Pressure (in. wg)
Volume (cfm)
097-A
Volume (m 3/hr)
Static Pressure (Pa)
RPM (Belt)
RPM (Direct)
RPM (Vari-Green)
HP
Density 0.075 lb/ft3
Density 1.2 kg/m3
18
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
Motor HP Fan
RPM
Static Pressure in Inches wg
Belt Direct 0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.125
071 097
1/6
or
1/8
VG-
1/4
720
CFM 157 107
BHP 0.01 0.01
Sones 1.8 2.0
790
CFM 172 128 70
BHP 0.01 0.01 0.01
Sones 2.3 2.3 2.2
C-1/8 860
CFM 187 148 101
BHP 0.02 0.02 0.02
Sones 2.8 2.7 2.7
930
CFM 203 166 124
BHP 0.02 0.02 0.02
Sones 3.3 3.4 3.2
1000
CFM 218 184 146 100
BHP 0.03 0.03 0.03 0.02
Sones 3.9 4.0 3.9 3.6
1070
CFM 233 202 167 130
BHP 0.03 0.03 0.03 0.03
Sones 4.6 4.7 4.5 4.2
B-1/6 1140
CFM 248 220 187 152 109
BHP 0.04 0.04 0.04 0.04 0.03
Sones 5.3 5.4 5.1 4.9 4.7
1285
CFM 280 255 228 197 166 127
BHP 0.06 0.06 0.06 0.05 0.05 0.05
Sones 6.8 6.7 6.6 6.3 6.0 5.9
1435
CFM 313 292 265 240 212 185 151
BHP 0.08 0.08 0.08 0.08 0.08 0.07 0.07
Sones 8.0 8.0 7.9 7.6 7.3 7.1 6.9
1580
CFM 344 324 302 281 255 230 205 177 140
BHP 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.09 0.09
Sones 9.5 9.5 9.4 9.1 8.8 8.5 8.3 8.1 7.9
A-1/4 1725
CFM 376 356 339 316 297 273 250 227 205 171
BHP 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.13 0.12 0.12
Sones 11.3 11.2 11.2 10.8 10.5 10.2 9.9 9.7 9.5 9.3
C-860-RPM B-1140-RPM A-1725-RPM VG-1725-RPM
Roof Downblast Exhaust
Belt & Direct Drive
GB-071 • G-097
Damper Size = 12 x 12 (305 x 305)
Roof Opening = 14½ x 14½ (368 x 368)
Shroud Thickness = 0.051 (1.3)
Motor Cover Thickness = 0.040 (1.0)
Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight G/GB = 54/60 lbs. (24/27 kg)
All dimensions in inches (millimeters). *May be greater depending on
motor. ^Weight shown is largest cataloged Open Drip-Proof motor.
MAXIMUM BHP AT A GIVEN RPM = (RPM/3371)3
MAXIMUM RPM - GB-071=1710, G-097=1725
TIP SPEED (ft/min) = RPM x 2.929
MAXIMUM MOTOR FRAME SIZE = 56
13⁄4(44)
243⁄8
(619)
43⁄8(111)
*233⁄4
(603)
19
(483)
Direct Drive RPM

D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
SY
S
T
E
M
C
U
R
V
E
Static Pressure (in. wg)
Static Pressure (Pa)
Volume (cfm)
3
Volume (m /hr )
RPM (Belt)
RPM (Direct)
RPM (Vari-Green)
HP
Density 0.075 lb/ft3
Density 1.2 kg/m3
19
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
Roof Downblast Exhaust
Belt & Direct Drive
GB-081 • G-098
Damper Size = 12 x 12 (305 x 305)
Roof Opening = 14½ x 14½ (368 x 368)
Shroud Thickness = 0.051 (1.3)
Motor Cover Thickness = 0.040 (1.0)
Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight G/GB = 54/60 lbs. (24/27 kg)
All dimensions in inches (millimeters). *May be greater depending on
motor. ^Weight shown is largest cataloged Open Drip-Proof motor.
13⁄4(44)
243⁄8
(619)
43⁄8(111)
*233⁄4
(603)
19
(483)
Motor HP Fan
RPM
Static Pressure in Inches wg
Belt Direct 0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.125
081 098
1/6
VG-
1/4
720
CFM 361 272
BHP 0.01 0.01
Sones 3.0 2.7
790
CFM 396 315 181
BHP 0.02 0.02 0.02
Sones 3.5 3.2 3
C-1/8 860
CFM 431 358 261
BHP 0.02 0.02 0.02
Sones 4.0 3.7 3.4
930
CFM 466 399 323
BHP 0.03 0.03 0.03
Sones 4.6 4.4 4.0
1000
CFM 501 439 372 259
BHP 0.03 0.04 0.04 0.04
Sones 5.3 5.1 4.7 4.4
1070
CFM 536 478 416 338
BHP 0.04 0.04 0.05 0.05
Sones 5.9 5.8 5.4 5.0
B-1/6 1140
CFM 571 517 460 396 283
BHP 0.05 0.05 0.06 0.06 0.05
Sones 6.6 6.5 6.1 5.7 5.5
1315
CFM 659 612 564 513 456 362
BHP 0.08 0.08 0.08 0.09 0.09 0.08
Sones 8.3 8.1 7.8 7.4 7.0 6.9
1490
CFM 746 706 663 621 574 525 452 353
BHP 0.11 0.12 0.12 0.12 0.12 0.12 0.12 0.11
Sones 10.1 9.9 9.8 9.3 8.9 8.6 8.5 8.4
1670
CFM 836 800 763 725 686 645 603 550 466 377
BHP 0.16 0.16 0.16 0.17 0.17 0.17 0.17 0.18 0.17 0.16
Sones 12.0 11.9 11.7 11.4 11.0 10.7 10.4 10.1 10.0 9.9
1/4 A-1/4 1725
CFM 864 829 793 756 719 679 640 592 527 441
BHP 0.17 0.18 0.18 0.18 0.19 0.19 0.19 0.19 0.19 0.18
Sones 12.7 12.5 12.3 12.1 11.7 11.4 11.1 10.8 10.6 10.5
MAXIMUM BHP AT A GIVEN RPM = (RPM/2985)3
MAXIMUM RPM - GB-081=1710, G-098=1725
TIP SPEED (ft/min) = RPM x 2.929
MAXIMUM MOTOR FRAME SIZE = 56
C-860-RPM B-1140-RPM A-1725-RPM VG-1725-RPM
Direct Drive RPM

D
O
N
O
T
S
E
L
E
C
T
T
O
T
H
E
L
E
F
T
O
F
T
H
I
S
S
Y
S
T
E
M
C
U
R
V
E
Static Pressure (in. wg)
Static Pressure (Pa)
Volume (cfm)
3
Volume (m /hr )
RPM (Belt)
RPM (Direct)
RPM (Vari-Green)
HP
Density 0.075 lb/ft3
Density 1.2 kg/m3
20
Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects
of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301.
Values shown are for installation type A: free inlet hemispherical sone levels.
Damper Size = 12 x 12 (305 x 305)
Roof Opening = 14½ x 14½ (368 x 368)
Shroud Thickness = 0.051 (1.3)
Motor Cover Thickness = 0.040 (1.0)
Curb Cap Thickness = 0.064 (1.6)
^Approximate Unit Weight G/GB = 54/61 lbs. (24/28 kg)
All dimensions in inches (millimeters). *May be greater depending on
motor. ^Weight shown is largest cataloged Open Drip-Proof motor.
13⁄4(44)
243⁄8
(619)
43⁄8(111)
*233⁄4
(603)
19
(483)
Motor HP Fan
RPM
Static Pressure in Inches wg
Belt Direct 0 0.125 0.25 0.375 0.5 0.625 0.75 0.875 1 1.125
091 099
1/4
VG-
1/4
720
CFM 546 403
BHP 0.02 0.02
Sones 3.6 3.5
790
CFM 599 471 291
BHP 0.02 0.02 0.02
Sones 4.2 4.1 3.9
C-1/8 860
CFM 652 536 400
BHP 0.03 0.03 0.03
Sones 4.9 4.7 4.5
930
CFM 705 598 481
BHP 0.04 0.04 0.04
Sones 5.6 5.5 5.1
1000
CFM 758 659 552 414
BHP 0.04 0.05 0.05 0.05
Sones 6.4 6.2 5.8 5.6
1070
CFM 811 718 621 512
BHP 0.05 0.06 0.06 0.06
Sones 7.3 7.1 6.7 6.3
B-1/6 1140
CFM 864 777 687 590 457
BHP 0.07 0.07 0.07 0.07 0.07
Sones 8.3 8.1 7.6 7.1 6.8
1285
CFM 974 897 819 736 647 526
BHP 0.09 0.10 0.10 0.10 0.11 0.10
Sones 9.5 9.4 9.0 8.5 8.2 7.9
1435
CFM 1087 1018 949 877 801 721 615 404
BHP 0.13 0.14 0.14 0.14 0.15 0.15 0.15 0.12
Sones 10.7 10.6 10.4 10.0 9.6 9.3 9.0 8.4
1580
CFM 1197 1135 1072 1009 941 872 799 707 583
BHP 0.17 0.18 0.19 0.19 0.19 0.20 0.20 0.20 0.19
Sones 12.1 12.0 11.9 11.5 11.2 10.9 10.6 10.3 9.8
A-1/4 1725
CFM 1307 1250 1192 1135 1076 1013 949 883 806 707
BHP 0.23 0.23 0.24 0.24 0.25 0.25 0.26 0.26 0.26 0.25
Sones 13.6 13.5 13.4 13.2 12.9 12.6 12.3 12.0 11.8 11.5
C-860-RPM B-1140-RPM A-1725-RPM VG-1725-RPM
Roof Downblast Exhaust
Belt & Direct Drive
GB-091 • G-099
MAXIMUM BHP AT A GIVEN RPM = (RPM/2703)3
MAXIMUM RPM - GB-091=1710, G-099=1725
TIP SPEED (ft/min) = RPM x 2.929
MAXIMUM MOTOR FRAME SIZE = 56
Direct Drive RPM