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  1. #1
    Join Date
    Jan 2008
    Posts
    91

    What's a dumper damper for?

    Pros,

    My parents have a ranch, 2 zones. Furnace is gas; single stage (I'm pretty sure).

    Not too far from the furnace, there is a large duct that connects directly from the supply to the return, with a counterweighted damper. The HVAC tech called it a "dumper damper". Great name.

    Is this a standard thing? Is it to equalize pressure if one zone is being heated/cooled?

  2. #2
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    That's the Bypass Damper,no big deal on the name,it allows excess air to bypass from the supply to the return,when less then all zones are calling .

    It should be closed when all zones are calling.

  3. #3
    Join Date
    Jan 2008
    Posts
    91
    Thanks dash.

  4. #4

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