Common Venting

Discussion in 'HVAC Heating & Cooling' started by jlperki, Dec 3, 2007.

  1. jlperki

    jlperki New Member

    Messages:
    1
    Is there such a thing as an inline flapper if you put a Y in the duct to outside so air doesn't go back?
  2. CHH

    CHH New Member

    Messages:
    225
    Location:
    Denver, CO
    In general, no. A damper such as you describe would be a dangerous obstruction.

    Some appliances have powered dampers to prevent backflow. Those appliances also have controls setup to prevent operation if the damper fails to open completely. I don't know if a powered damper can be used on a shared vent.
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