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.
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..
These spun aluminum ventilators 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, GB, H-G, and H-GB. The model GRSF has a built in flashing flange for quick and easy installations without a roof curb.
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.
The RGU gravity upblast ventilator is designed for use as a weatherproof
outlet on vertical high velocity exhaust systems
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- Gravity Fabra Hoods
(Models FHI/FHR) (1511k)
- Gravity Fabra Hoods (Models FGI/FGR) (1890k)
- Gravity Ventilators
(Model GRS) (495k)
- Louvered Penthouses (Models
- Gravity Ventilator, Model FGI (592k)
- Gravity Ventilator, Model FGR (593k)
- Gravity Ventilator, Model GRSI (594k)
- Gravity Ventilator, Model GRSR (594k)
- Gravity Ventilator, Model RGU (587k)