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Installing a ventilating fan in your bath will help eliminate fogged-up windows, steamy mirrors and stale odors. But more importantly, it will help prevent moisture-related problems, such as the growth of mold and mildew. Here, This Old House general contractor Tom Silva shows the proper way to install a bath vent fan. In this particular installation, Tom ran the exhaust duct into the attic and through a sidewall to the outdoors.
Other venting options includes running the duct up through the roof or down through the soffit. Note that the fan must always exhaust to the outdoors; never allow the duct to simply blow into an attic, crawlspace or other enclosed area. Also, the installation will go much quicker if you ask a spouse or friend to help be in the attic while you work from below, or to hand you tools while you’re on the ladder.
Other venting options includes running the duct up through the roof or down through the soffit. Note that the fan must always exhaust to the outdoors; never allow the duct to simply blow into an attic, crawlspace or other enclosed area. Also, the installation will go much quicker if you ask a spouse or friend to help be in the attic while you work from below, or to hand you tools while you’re on the ladder.
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