The fan / light combo that comes in most /all bath and toilet areas are close to hood ornaments.. esp the fan. Saying it is an exhaust fan is an insult to the word exhaust. Most replacements have some type of CFM rating. Get one that moves as much air with as few decibels as you can stand. A competent electrician will cut in the fan with no visible drywall repair or painting required. They will also go up in the attic and insure that the fan is properly hooked up to exhaust the fumes and vapor properly.
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