Number of Results: 52
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.