Step 3: Insert The Fan

step by step how to install a bigger bathroom fan insert fan into opening
Photo: Wendell T. Webber
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Tilt the fan into the opening, and screw one lip of the housing to the bottom edge of a joist. If there isn't a joist in the right spot, get a helper to hold the fan from below while you attach brackets to the faces of two joists from above (see Step 4). If you can't access the fan from above, enlarge the ceiling hole enough for you to reach in and attach the brackets from below.
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    Tools List

    • flathead screwdriver
      Flat-head screwdriver
    • Phillips screwdriver
      Phillips-head screwdrivers
    • keyhole saw
      Keyhole saw
    • drill
      Drill/driver

    Shopping List

    Bath fan rated to your bath's cfm needs
    Insulated duct
    Zip ties
    Foil tape