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    Backdraft damper, vertical mount, Model BD-330, 18 In Sq, No Flange, Performance up to 1,500 ft/min

    Greenheck Product # BD330-18X18
    Price
    $109.74

    The BD-330 is a vertical mount backdraft damper designed to allow horizontal airflow and prevent reverse airflow. The dampers are opened by air pressure differential and closed by gravity. The damper features a flangeless, galvanized steel frame with aluminum blades.

    • Complies with the International Energy Conservation Code (IECC) and ASHRAE 90.1 leakage requirements for non-motorized dampers
    • AMCA certified for Air Leakage and Air Performance
    • Width and height furnished approximately 0.125 in. under size
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