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

    Jan 27, 2010, 07:47 PM
    Condensation in air ducts
    Hi,

    Our house vents ( in the attic) build condensation and then drip from various vents though out the house. My husband says that they are insulated and not leaking anywhere. Could you help in providing solutions or ideas? Oh, we don't use the heater we have a wood stove for the winter and no air conditioning, a swamp cooler in the summer time vented through.
    Thanks,
    TR
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 27, 2010, 09:46 PM
    Condensation is caused by moisture forming on cold surfaces. While it might be more complex factually the answer I gave is a simple one.

    Is your attic ventilated correctly? This could be a cause.

    Do the bath fans go outside or are they vented into the attic or over to a side vent?

    Since I am not there to see the situation it could be other items but I hate a witch hunt so I will leave my answer as to what to look for first and that is excessive moisture and cold metal.

    Also see

    Attic Condensation Information from E.H. Lawrence Company

    Attic Venting, Attic Moisture and Ice Dams | CMHC

    Frost is caused by moisture that escapes up through attic bypasses then condensing on the roof boards and rafters, Houle Insulation, Houle Insulation Inc., houleinsulation.com, houleinsulationinc.com


    Attic Ventilation
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