0
items
You have no items in your shopping cart.
0 items
- /
- Products /
- Fans /
- Roof Mounted Fans /
- Centrifugal Downblast Exhaust Fans /
- GB
GB
Model GB is a belt drive centrifugal roof exhaust fan for general clean air applications where the air discharge is downward, toward the roof surface. The GB features a spun aluminum housing.
Filter in use
Performance Filter
Elevation: 0 feet
Calculate Air Exchange (CFM)
Use the calculator to determine the Air Exchange (CFM) required to adequately ventilate an area.Enter information into the fields below in order to calculate the CFM (per fan).
To calculate the CFM required to adequately ventilate an area, we divide the room volume by the appropriate "Minutes per Change" value.
[CFM] = [Room Volume] / [Min./Chg.]
Airflow (CFM) per Fan
*
Starred items represent required fields.
Calculate Static Pressure (SP)
Use the calculator to determine the amount of static pressure the fan must overcome.The pressure generated by fans in ductwork is typically very small. An accurate measurement of static presure is critical to proper fan selection however. Static pressure in fan systems is typically less than 2" SP, or 0.072 Psi.
The amount of static pressure that the fan must overcome depends on the air velocity in the ductwork, the number of duct turns (and other resistive elements), and the duct length. For properly designed systems with sufficient make-up air, the guidelines in the table below can be used for estimating static pressure.
Static pressure
* Starred items represent required fields.
Static Pressure Guidelines
Non-Ducted 0.05" to 0.20"
Ducted 0.20" to 0.40" per 100 feet of duct (assuming duct air velocity falls within 1,000 to 1,800 feet per minute)
Fittings 0.08" per fitting (elbow, register, grill, damper, louver, duct turn, etc.)
Kitchen Hood Exhaust 0.625" to 1.50"
Important: Static pressure requirements are significantly affected by the amount of make-up air supplied to an area. Insufficient make-up air will increase static pressure and reduce the amount of air that will be exhausted. Remember, for each cubic foot of air exhausted, one cubic foot of air must be supplied.
View as
Sort by
Results per page
Showing
15
of
99
results
| SKU | DRIVE TYPE | HP | VOLTAGE | PHASE | CFM RANGE | FRPM RANGE | BASE/PANEL LENGTH x WIDTH | PRICE | ||
|---|---|---|---|---|---|---|---|---|---|---|
|
Model / Size:
GB-180
|
Belt Drive | n/a | n/a | n/a | 2301-3850 | 850-990 | 30 x 30 in | $1,472.94 | ||
|
Model / Size:
GB-180
|
Belt Drive | n/a | n/a | n/a | 2969-4783 | 990-1230 | 30 x 30 in | $1,472.94 | ||
|
Model / Size:
GB-180
|
Belt Drive | 1 | 115 208 230 |
1 | 2301-3850 | 850-990 | 30 x 30 in | $1,490.05 | ||
|
Model / Size:
GB-180
|
Belt Drive | 1 | 115 208 230 |
1 | 2969-4783 | 990-1230 | 30 x 30 in | $1,490.05 | ||
|
Model / Size:
GB-180
|
Belt Drive | n/a | n/a | n/a | 2686-4355 | 920-1120 | 30 x 30 in | $1,523.54 | ||
|
Model / Size:
GB-180
|
Belt Drive | n/a | n/a | n/a | 3253-5444 | 1120-1400 | 30 x 30 in | $1,523.54 | ||
|
Model / Size:
GB-180
|
Belt Drive | 1 1/2 | 115 208 230 |
1 | 2686-4355 | 920-1120 | 30 x 30 in | $1,683.87 | ||
|
Model / Size:
GB-180
|
Belt Drive | 1 1/2 | 115 208 230 |
1 | 3253-5444 | 1120-1400 | 30 x 30 in | $1,683.87 | ||
|
Model / Size:
GB-180
|
Belt Drive | 2 | 208 230 460 |
3 | 3082-4549 | 1070-1170 | 30 x 30 in | $1,502.87 | ||
|
Model / Size:
GB-180
|
Belt Drive | 2 | 208 230 460 |
3 | 3210-5677 | 1170-1460 | 30 x 30 in | $1,502.87 | ||
|
Model / Size:
GB-180
|
Belt Drive | n/a | n/a | n/a | 1371-2644 | 550-680 | 30 x 30 in | $1,192.89 | ||
|
Model / Size:
GB-180
|
Belt Drive | n/a | n/a | n/a | 1929-3305 | 680-850 | 30 x 30 in | $1,192.89 | ||
|
Model / Size:
GB-180
|
Belt Drive | 1/4 | 115 | 1 | 1527-2411 | 500-620 | 30 x 30 in | $1,176.50 | ||
|
Model / Size:
GB-180
|
Belt Drive | 1/4 | 115 | 1 | 1701-2994 | 620-770 | 30 x 30 in | $1,176.50 | ||
|
Model / Size:
GB-180
|
Belt Drive | n/a | n/a | n/a | 1612-2450 | 510-630 | 30 x 30 in | $1,324.72 |
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1HP, 208-230/460V, 3Ph, Motor & Drives Unassembled, 2301-3850 CFM
$1,472.94
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1HP, 208-230/460V, 3Ph, Motor & Drives Unassembled, 2969-4783 CFM
$1,472.94
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1HP, 115/208-230V, 1Ph, Motor & Drives Unassembled, 2301-3850 CFM
$1,490.05
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1HP, 115/208-230V, 1Ph, Motor & Drives Unassembled, 2969-4783 CFM
$1,490.05
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1 1/2HP, 208-230/460V, 3Ph, Motor & Drives Unassembled, 2686-4355 CFM
$1,523.54
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1 1/2HP, 208-230/460V, 3Ph, Motor & Drives Unassembled, 3253-5444 CFM
$1,523.54
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1 1/2HP, 115/208-230V, 1Ph, Motor & Drives Unassembled, 2686-4355 CFM
$1,683.87
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1 1/2HP, 115/208-230V, 1Ph, Motor & Drives Unassembled, 3253-5444 CFM
$1,683.87
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 2HP, 208-230/460V, 3Ph, Motor & Drives Unassembled, 3082-4549 CFM
$1,502.87
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 2HP, 208-230/460V, 3Ph, Motor & Drives Unassembled, 3210-5677 CFM
$1,502.87
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1/3HP, 115/208-230V, 1Ph, Motor & Drives Unassembled, 1371-2644 CFM
$1,192.89
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1/3HP, 115/208-230V, 1Ph, Motor & Drives Unassembled, 1929-3305 CFM
$1,192.89
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1/4HP, 115V, 1Ph, Motor & Drives Unassembled, 1527-2411 CFM
$1,176.50
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1/4HP, 115V, 1Ph, Motor & Drives Unassembled, 1701-2994 CFM
$1,176.50
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Centrifugal Downblast Exhaust Fan, Model GB-180, Belt Drive, 1/2HP, 208-230/460V, 3Ph, Motor & Drives Unassembled, 1612-2450 CFM
$1,324.72
Model GB, belt drive centrifugal roof exhaust fans are designed to meet the general clean air exhaust requirements for industrial and commercial buildings. Units feature a fully rolled windband bead for increased stability and easy transport. Fresh outside air is drawn in under the motor cover to maximize motor life.
- Centrifugal wheel provides high-efficiency and minimal sound
- True vibration isolation supports the motor and wheel for long life and quiet operation
- One-piece aluminum curb cap provides a weather-tight fit
- Positive motor cooling with fresh air results in maximum motor life
- Galvanized birdscreen protects the fan discharge from birds and small objects
- Motor, pulleys and belt ship separately for field assembly
Find by Performance
Our performance filter tool can help you choose the right product based on your performance requirements.
Filter Products
Applications/uses for a particular fan or ventilator.
Refers to the location where a fan or ventilator can be mounted.
Square base dimension on power roof ventilators. Square fan panel dimension on sidewall propeller fans.
Transmission type of the ventilator (belt drive or direct drive).
Indicates the space relationships of windings and changing values of the recurring cycles of AC voltages and currents. The most common power supplies are either single- or three-phase.
The force that causes a current to flow in an electrical circuit. The voltage of a motor is usually determined by the supply to which it is attached. NEMA requires that motor be able to carry its rated horsepower at nameplate voltage plus or minus 1% al
The power required to drive an air moving device. Horsepower required varies with system conditions.
The "ACTUAL" damper width and height. Dampers are undersized to allow them to be mounted into the duct work/wall opening.
Showing
of
results
Can't find what you were looking for? Visit Greenheck.com
Chat with a Quick Delivery Specialist
Weekdays 8AM - 5PM Central Time | English Only
Weekdays 8AM - 5PM Central Time | English Only
Version 1.0, April 2019
© 2021 Greenheck Fan Corporation. All rights reserved.