The SmartZone™ RSRDA‐series low-pressure two‐posiƟon damper was developed for precise control of supply air in the HVAC duct system. Rigid aluminum components provide a strong, yet lightweight construcƟon. The damper actuator is designed for years of care‐free operaƟon. A bright red LED indicates when the damper is powered. The power close/spring open design guarantees precise control of supply air into each zone. Long‐life nylon gears drive the opposed blades open and closed. Opposed blade design reduces turbulence in the air stream. 30 Second operaƟon to full open posiƟon. Custom sizes are available.