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

    Feb 8, 2010, 09:29 PM
    White powder buildup on furnace ducting
    There is a white powder looking substance builtup on the joints of the furnace ducting. Can anyone tell me what it is and if I should be calling someone to fix this issue. Is this normal or not?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 8, 2010, 10:14 PM
    Not normal but I would have it checked out.
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