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Steel Frame

Backdraft dampers for exhaust or intake in vertical or horizontal applications.

Backdraft dampers (also known as gravity dampers) used in ventilation systems allow airflow in one direction and prevent airflow in the opposite direction. These can be operated by gravity or be motorized to open and closed when required. The frame is constructed of galvanized steel.

BD-100

Backdraft damper, exhaust, horizontal mount, vertical airflow up.

VIEW BD-100
https://catalog-api.greenheck.com/api/product/en-us/150

BD-300 Series

Backdraft damper, exhaust, vertical mount, horizontal airflow.

VIEW BD-300 Series
https://catalog-api.greenheck.com/api/product/en-us/149

BD-90

Backdraft damper, exhaust, horizontal mount, vertical airflow up.

VIEW BD-90
https://catalog-api.greenheck.com/api/product/en-us/155

GM-30 Series

Backdraft damper, exhaust, vertical mount, horizontal airflow.

VIEW GM-30 Series
https://catalog-api.greenheck.com/api/product/en-us/148

WD-100 Series

Backdraft damper, exhaust, horizontal mount, vertical airflow up.

VIEW WD-100 Series
https://catalog-api.greenheck.com/api/product/en-us/154

WD-200 Series

Backdraft damper, intake, vertical or horizontal mount.

VIEW WD-200 Series
https://catalog-api.greenheck.com/api/product/en-us/153

WD-300 Series

Backdraft damper, exhaust, vertical mount, horizontal mount.

VIEW WD-300 Series
https://catalog-api.greenheck.com/api/product/en-us/152

WD-340

Backdraft damper, used on centrifugal utility fans.

VIEW WD-340
https://catalog-api.greenheck.com/api/product/en-us/151

WD-400 Series

Backdraft damper, intake, vertical or horizontal mount.

VIEW WD-400 Series
https://catalog-api.greenheck.com/api/product/en-us/146