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mtsullivan_gw

bathroom fan for a small bathroom

12 years ago

Hi,

I have a small bathroom (7' x 7') with a shower/tub combo. I have a Nutone QT9093 fan (110 CFM). According to a fan size calculator, I should only need 50 CFM for a room this small. When I take a shower, the mirror still fogs up. With this fan, should I be able to take a shower and not have the mirror fog up? The fan vents to the roof and the roof cap has a sharp turn to keep the rain out.

http://www.ventingdirect.com/broan-634m-steel-roof-cap-for-6-round-ducting-with-backdraft-damper/p417814

Could the sharp turn be blocking airflow? My other option is to redirect the vent so it goes out the wall. Do you think this would solve the issue?

Thanks

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