the villages puts in a nutone 744nt series fan lite which moves at best 70cfm.
In some of the big bathrooms like in an IVY it doesn't move enough air , my husband is a home builder and argued this point with the head of home warranty Dennis however lost the fight, unfortunately they can't calculate cfm's per square foot, even with the help of nutone engineers, (so Sad).
Unfortunately the villages does alot in trial and error.
Well we added a 2nd one in place of a can lite next to it and ran a separate duct to the soffit and put in draft back flow dampers in the soffits that the villages missed and is a direct must under Nutone standards.
The 2nd fan is paralleled in electrically with the first fan and is on a 15 to 1 hr selectable wall timer.
It solved all are humidity problems and foging of the mirrors.
Good luck folks.
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