Durozone RD 8” round damper with 24 volts AC, 3 wire power close/power open damper. (Picture shown is 10” - all others similar.) One of the oldest and most proven designs in the motorized damper business, the Durozone RD damper is an outstanding value and features a 3 wire, power open, power close motor.  Unlike spring return dampers, the  3 wire design only uses power when the damper is moving. 


The Durozone RD-08 damper series can be controlled by a standard thermostat with no extra relay needed, unlike most other 3 wire dampers.  A 5 year, best in business, warranty is standard with this damper.  “Normally open” or “normally close” does not apply to these dampers since no spring is involved and dampers use power only when moving.


Check our pictures: blades riveted (not spot welded) with heavy duty construction throughout.  Compatible with virtually any 24vac Zone control system or thermostat. Message us at damperdirect via ebay for additional technical or application information.  


  • 7 second actuation time
  • Low power, intermittent operation - uses power only when moving (unlike spring return dampers)
  • 1 40vac transformer will power up to 8 of these dampers 
  • 24vac powered and works with almost all zone control systems and thermostats, no matter what brand
  • Industry leading 5 year warranty 
  • Heavy duty galvanized metal can with reinforcing beads
  • Blade is riveted on - not cheap spot welded
  • Service and support - message us at damper direct via ebay
  • Direct drive quality - no cheap gears or springs
  • Outstanding, long-time USA manufacturer with great reputation 


PLEASE NOTE:  These dampers are manufactured without polyurethane seals.  Seals can be provided upon request for customer installation.  Please put this in "notes" when you order.


From damperdirect, where zoning is our only business! We offer the service, support, and technical resources to help you design or service your Zone Control System.


We handle all major brands including Durozone, Honeywell, EWC, RetroZone™, Enerzone Systems Corp., Robertshaw, Invensys, and more. If you don’t see what you’re looking for on our ebay listings, please message us at damperdirect via ebay.