Backdraft Damper Can-Fan 8 "

Backdraft Dampers prevent air from reverse flowing through the fan when powered off. It is recommended as the next line of defence against odor control.  Features: Spring loaded for positive closure. The rigid design is constructed from galvanized steel for the collar and lightweight aluminum for the damper blades. Can be mounted horizontally or vertically for horizontal or vertical airflow.Available sizes 4", 6", 8", 10", 12", 14"