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Old 03-04-2010, 10:42 AM   #1
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Bathroom Exhaust Fan


My house built in the early 80's doesn't have any exhaust fans in the two upstairs bathrooms. The bathrooms back on to each other.
Could I install a attic mounted inline fan and draw from both bathrooms at the same time? The total square footage for both bathrooms is about 100. The fan I'm looking at is rated at 100cfm.
Could I control the fan at both bathrooms using timer switches in parallel?

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Old 03-05-2010, 04:40 AM   #2
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Bathroom Exhaust Fan


Your bathrooms are about 5x10 each I guess by your dimensions. The typical bath fan pushes 55 cfm...so you're really close for the 2 of them. I don't believe you could wire one fan motor though on 2 timers...you could possibly do it with a three way wiring set up...but..what would you do when 2 people are showering at the same time? Usually the one would backfeed into the other one and cause a dead short as they were both activated.

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Old 03-05-2010, 06:21 AM   #3
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Bathroom Exhaust Fan


You'll want a slightly larger fan, around 150 CFM.

Timers will work fine, since you'll be wiring them in parallel.
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Old 03-05-2010, 08:20 AM   #4
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Bathroom Exhaust Fan


Have you checked out Fantech?
http://www.fantech.net/bathroom.htm
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Old 03-05-2010, 09:31 AM   #5
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Bathroom Exhaust Fan


Thanks guys.
I'm going to look for a higher rated fan closer to 200 cfm.
Fantech has some interesting products.
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Old 03-06-2010, 10:28 AM   #6
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Bathroom Exhaust Fan


Check this one for 2 bathrooms

Fantech CVS 275A

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