Greenheck’s HB Series of Heavy Duty Industrial Backdraft Dampers includes the recently released HBR-150, a round industrial backdraft damper with a flanged-style frame. The HBR-150 is rated for ...

Heavy-duty, double-flanged, channel frame-style backdraft tornado dampers are designed to protect against tornados and rapid pressure changes. Installed in ductwork or wall mounted near the exterior ...

Q. Our home has a combination microwave/range hood that discharges directly through the sidewall of our home. The wall jack has a weather-head with a spring closure for the backdraft damper. The ...