Adjusting Bath Fan Use in Winter

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Do you really need to run it when you shower?

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You may have heard or read somewhere that you should run your bathroom exhaust fan whenever you take a shower and then let it run for a while after you’re done with the shower. Showers increase the humidity in the bathroom. Sometimes it gets high enough to cause condensation to appear on the mirror and other surfaces in the bathroom. And that can result in mold growth.

So you should always run your bath fan when you shower. Or so they say.

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[source: http://www.greenbuildingadvisor.com/articles/dept/building-science/adjusting-bath-fan-use-winter]


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