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Difficulty: Moderate
Can escalate to challenging, depending on how easy it is to run the duct to the outdoors.
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.
