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  1. #1
    Join Date
    Jan 2003
    Posts
    20

    Exclamation

    My heating contractor said it was ok to vent a 90% furnace throug the existing chiminey i do not think he is correct any feedback

  2. #2
    Join Date
    Oct 2005
    Posts
    68
    Why wont they put a flashing on the roof and vent it with a nice one piece concentric vent kit?

  3. #3
    Join Date
    Mar 2004
    Location
    Grottoes VA
    Posts
    5,856
    Yes you may vent "through" an exsisting chimney.

    The chimney must not be used for any other appliance and the pvc must extend all the way to the top of the chimney.
    Karst means cave. So, I search for caves.

  4. #4
    Join Date
    Nov 2001
    Posts
    1,874
    I've done it,
    Just the way Karsthuntr said, works fine and looks good.
    You should also put a cap on the top of the chimney.
    Have the pvc go through that.
    If you try to fail, and succeed.
    Which have you done ?



  5. #5
    Join Date
    Dec 2004
    Location
    Derby City
    Posts
    3,973
    victoff75: just curious, why did you not believe it correct when your heating contractor told you this?
    Everyone has a purpose in life..........even if it's to be a bad example.

    Seek first to understand, before seeking to be understood.

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