The WD-200 series backdraft dampers are motorized to open when energized and the spring return closes when de-energized. Model WD-200 has no flange, model WD-210 has a flange on the motor side and model WD-220 has a flange opposite the motor. The WD-200 series is for horizontal or vertical mounting. Electric motorpacks ship separately.

• Pressure: Up to 1 in. wg (0.25 kPa)
• Velocity: Up to 2500 fpm (13 m/s)
• Temperature: Up to 180°F (82°C)
• Primary application: Prevent undesirable reverse airflow when installed with roof or sidewall supply (intake) fans.