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  1. #1
    Join Date
    Jul 2002
    Posts
    79

    Duct in Exterior Walls

    Is it acceptable to run 6" oval supply duct in exterior walls or is there a problem with it - insulation or other wise?

    Thank You,

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,821
    Unfortunately, its done.
    Worse place to put it.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  3. #3
    Join Date
    Feb 2007
    Location
    18951
    Posts
    1,593
    If it's for heating, you could lose a lot out the wall. If it's for cooling, and touches the wall, you could ruin it eventually. If it's the only place you can run it, I'd recommend spray foam between the duct and wall.

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