WD-100 Backdraft Damper, Horizontal Mount, For Use with G, GB, GRS, CUBE Fans

The WD-100 series backdraft dampers mount horizontally to allow vertical airflow up and prevent reverse airflow. Model WD-100 has no flange. These dampers open using air pressure differential (assisted by springs) and close using gravity. An optional motorpack converts the dampers to motorized operation.