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Intake Gravity Ventilators
The gravity intake ventilators are non-powered and work on pressure differential between the inside and outside of the building.
OVERVIEW
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FGI
Gravity ventilators designed for intake applications with natural gravity or negative pressure systems. Units feature a low silhouette, fabra hood style housing.
- 0 to 109,800 cfm
- Up to 0.35 in. wg.
Purchase Options:
![](https://content.greenheck.com/public/DAMProd/Website_Square_Desktop/10002/GRS-36.png)
GRSI/GRSF
The GRSI 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.
- 180 to 15,200 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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FGIGRSI
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- Videos
- Other Product Information
- Warranty