In observance of Memorial Day, Greenheck will be closed Monday, May 27th. Order shipments will resume Tuesday, May 28th.


    Backdraft damper, horizontal mount, Model WD-100, 12 In Sq, No Flange, Performance up to 2,500 ft/min

    Greenheck Product # WD100-12X12

    The WD-100 series are horizontally mounted backdraft dampers designed to allow vertical airflow up and prevent reverse airflow. The dampers are opened by air pressure differential (assisted by springs) and closed by gravity. The damper features a flangeless, galvanized steel frame and aluminum blades.

    • Width and height furnished approximately 0.125 in. under size
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