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  1. #1
    Join Date
    Oct 2007

    Default installing bath fan

    need to run a 4 inch bath exhaust line through 3 2X8 joists. i asuume since i am cutting most of the joist out i need to support it but how??? thanks guys and girls

  2. #2
    Join Date
    Aug 2007
    Denver, CO

    Default Re: installing bath fan

    No expert here but every one I have ever seen had the duct running parallel with the joists and out the rim joist.

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