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  1. #1
    Join Date
    Oct 2007
    Southeastern Virginia

    Default gas vent on roof forming ice

    I inspected a newer home today and had the following concern.
    The gas furnace and intake are located near the roof peak. The furnace was running and the vent/flue gases were exhausting or venting out of the plastic vent pipe. The problem was/is, the gases are condensing when they hit the cold air (20-30 degress, cold for Virginia), dripping down onto the roof surface, then forming ice. No leaking or ice formation was observed in the attic space. This does not seem correct. Has anyone else seen this condition? If so, what are your comments or concerns?
    I noted the conditions observed, but I'm not sure if this can lead to problems. It just doesn't seem right.

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