Backdraft Dampers

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Backdraft damper, vertical mount, Model WD-330, 14 In Sq, No Flange, Performance up to 2,500 ft/min

Availability:  3 in Troy
The WD-330 series dampers are designed to prevent reverse airflow in horizontal exhaust applications. The WD-330 features a pressure sensitive blade design that opens and remains open under low velocity conditions. The dampers are opened by air pressure differential and closed by gravity. Galvanized steel, flangeless frame. Width and height furnished approximately 0.125 in. under size