Relief Gravity Ventilators
Gravity relief ventilators are non-powered and work on pressure differential between the inside and outside of the building.
OVERVIEW
FGR
Gravity ventilators designed for relief applications with natural gravity or negative pressure systems. Units feature a low-silhouette, fabra hood-style housing.
- 0 to 96,800 cfm
- Up to 0.3 in. wg.
Configure to Order
GRSR/GRSF
The GRSR is a spun aluminum air relief roof ventilator for natural gravity or positive pressure systems. This model can mount either to a roof curb or with a flashing flange (GRSF) for quick and easy installations.
- 230 to 18,400 cfm
- Up to 0.4 in. wg.
- Catalogs
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Instruction Manuals
- Fabra Hood, Multi Section with Birdscreen, throat length greater than 72 inches (#471323 IOM)
- Fabra Hood, Multi Section with Filters, throat length greater than 72 inches (471324 IOM)
- Fabra Hood, Single Section with Birdscreen, throat length less than or equal to 72 inches (#471321 IOM)
- Fabra Hood, Single Section with Filters, throat length less than or equal to 72 inches (#471322 IOM)
- Model GRSI GRSR (#483464 IOM)
- Specifications
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Drawings
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STATIC MODEL DOWNLOAD3D CAD2D CAD
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FGR
GRSR
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- Videos
- Other Product Information
- Warranty