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

    Nov 19, 2009, 06:49 AM
    Black Film on Walls
    Looks like I have to write a question before I can read any reply. What a stupid system.

    I just try to find out where the grey/black "film" on near the ceiling at my walls is coming from. We regularly open windows to let fresh air in and I recently read that this has to do with evaporation of paint and floor board.

    Can anyone help? Thanks
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 19, 2009, 11:15 AM
    It could very well be a problem with your furnace heat exchanger if so equipped. It would be best to have it checked by a on site professional.
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