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    ctwells's Avatar
    ctwells Posts: 1, Reputation: 1
    New Member
     
    #1

    Nov 21, 2008, 10:37 PM
    Noise when 2 zones of radiant heating system used
    When I start up 2 or more zones of my radiant heating I get a whoo whoo noise over and over. Any suggestions? I have already tried bleeding the air from the system. The system has a newer bladder system expansion tank. It doesn't happen with just one zone, only when a second is activated.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Nov 21, 2008, 11:12 PM
    How many pumps on the system?
    Has the system been balanced?

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