Intake Gravity Ventilators
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.
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.
- 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)
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