Retro Dampers (RD-XX Series)
This product comes in different variations.

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Retro Dampers (RD-XX Series)
  RD-05 - 5" Round Retro Damper  
  RD-06 - 6" Round Retro Damper  
  RD-07 - 7" Round Retro Damper  
  RD-08 - 8" Round Retro Damper  
  RD-09 - 9" Round Retro Damper  
  RD-10 - 10" Round Retro Damper  

These low-cost dampers make it easy to quickly add zoning to an existing duct system. The Retro Damper is the perfect alternative to expensive pneumatic systems that require special plastic tubing and pumps. This damper uses standard thermostat wire and will work with most zone control panels.

5418 Elmwood Ave | Indianapolis IN 46203 | 888-652-9663