Backdraft Dampers - Steel Frame - BD-100

The BD-100 backdraft damper mounts horizontally to allow vertical airflow up and prevent reverse airflow down. The dampers are open by air pressure differential and closed by gravity. Pressure: Up to 2 in. wg (0.5 kPa) Velocity: Up to 1500 fpm (7 m/s) Temperature: Up to 180°F (82°C) Accessory to power roof ventilators and centrifugal roof exhaust fans