Models G and GB
Spun Aluminum • Downblast
Centrifugal Roof Exhaust Fans
Model Comparison
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| General/Clean Air | Contaminated Air | Spark Resistant | Grease (UL 762) | Smoke Control (UL)** | High Wind (150 mph)* | Continuous High Temp (above 200°F ) |
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| Maximum Volume (cfm) | Maximum Static Pressure (in. wg) |
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| Outdoor | Indoor | Roof Curb | Base/Floor | Hanging | Wall | Exhaust | Supply | Reversible | Recirculate | Belt | Direct | Centrifugal |
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G | |
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| 6,308 | 1..5 | $ |
GB | |
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| 44,700 | 3..25 | $ |
*High wind limited to sizes 300 and smaller
**Smoke Control available on models: 101, 101HP, 121, 131, 141, 141HP, 161, 161HP, 200, 240, 300, 360, 420 and 480..
Greenheck models G and GB centrifugal roof exhaust 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,
•For long and/or high resistance ductwork
•Low volume/high pressure
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