Gravity Intake and Relief Ventilators

The Gravity Intake, Relief ventilators, and Power roof ventilators (PRV) are non-powered and work on pressure differential between the inside and outside of the building.

Gravity Intake and Relief Ventilators

Overview

  • Models GRS/GRSF

    Models GRS/GRSF

    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.


  • Models FGI/FGR

    Models FGI/FGR

    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.


  • Model RGU

    Model RGU

    The RGU gravity upblast ventilator is designed for use as a weatherproof outlet on vertical high velocity exhaust systems


  • Model WIH/WRH

    Model WIH/WRH

    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.


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FGI In CAPS Transmit     Download   Download
FGR In CAPS Transmit     Download   Download
GRSF In CAPS Transmit          
GRSI In CAPS Transmit     Download   Download
GRSR In CAPS Transmit     Download   Download
RGU In CAPS Transmit         Download
WIH In CAPS Transmit     Download    
WRH In CAPS Transmit     Download    

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