Backdraft Dampers - Steel Frame - WD-340

The WD-340 backdraft damper bolts to the flanged outlet of Greenheck model USF utility blowers. Motorpacks are optional. Pressure: Up to 2 in. wg (0.5 kPa) Velocity: Up to 2500 fpm (13 m/s) Temperature: Up to 180°F (82°C)