Gravity Intake and Relief Ventilators
The Gravity Intake and Relief ventilators are non-powered and work on pressure differential between the inside and outside of the building.
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These spun aluminum power roof ventilators (PRV) are designed as intake or relief units for natural gravity or negative pressure systems. Model GRSI for intake and model GRSR for relief have an appearance to blend with other Greenheck products like Models G and GB. The model GRSF has a built in flashing flange for quick and easy installations without a roof curb.
Model FGI for intake and FGR for relief have the low silhouette Fabra Hood design. The Fabra Hood design is superior in appearance, load bearing strength, weather resistance, and dimensional flexibility.
The RGU gravity upblast ventilator is designed for use as a weatherproof outlet on vertical high velocity exhaust systems
These louvered penthouse ventilators are designed for where aesthetics are a concern. The housing is a louvered penthouse style that features extruded aluminum louvers. These models are designed for intake and relief applications for natural gravity or negative pressure systems. The louver design affords lower pressure drops while maintaining low hood heights and avoids the problem of detracting from architectural aesthetics. Their appearance blends with other Greenheck products like Models LDP, LBP, RSFP, and LSF.
- 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)
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