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Exhaust Fans

Posted by Andrew in NY on October 23rd, 2002 03:00 PM
In reply to Exhaust 2 bath fans through 1 roof vent? by Scott K. on October 23rd, 2002 01:48 PM [Go to top of thread]


In theory, this should work because each exhaust fan should be equipped with a one-way flap that prevents air from entering the bathroom through the fan. However, speaking from experience, if I take a shower in one bathroom and have that fan on, the other bathroom seems to experience increased humidity. It's not so much as to cause a problem, so it probably depends on how much use your bathrooms get.

Also, when you have the fan on in one bathroom, you can hear it very clearly in the other!

I have a contractor coming to do work in one of my bathrooms, and while he did not give a detailed explanation why, he strongly recommended using a through-roof vent for each fan. He will be vaulting the ceiling, so I will likely have him install two through-roof vents, 1 for each fan!

Hope this helps.


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