BD-90

The BD-90 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

Codes:

ASHRAE 90.1

Certifications:

AMCA Air Leakage and Air Performance

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