Condensing vapor
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  1. #1
    Join Date
    Jun 2004
    Posts
    8

    Question

    I have an 80% efficient furnace. the combustion chamber is fan assisted and goes into my chimney the chimney is lined with a flexable aluminium duct. is is capped on the top.
    at the point the duct goes into the chimney there is moisture. the furnace starts the fan before firing and runs after firing , but I still have a moisture problem. is there anything that can be done to keep this from happening?
    I have not noticed this until recently. the furnace has been installed for 5 years.

    Thanks
    Mike

  2. #2
    Join Date
    Jun 2004
    Posts
    8
    Some more info.
    I took off the elbow to see if there was something plugging it. there was some debris in the duct. cleaning it out didn't resolve the problem.







    Mike

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