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

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
Availability:  5 in Troy
SKU: WD3301414
Products specifications
Attribute name Attribute value
Weight 5 lbs
Max Velocity 2500
Pressure Differential Max 2
Mounting Position Vertical
Frame Material Galvanized Steel
Frame Gauge 18
Frame Type No Flange
Blade Material Roll formed aluminum
Blade Gauge 0.125
Warranty Length 1 Year