View Bathroom Fan Cfm Sizing Background. So if you have a bathroom that is 12 feet. According to modern research , a fan's ability to depressurize a room is dependent on its size and how well it's installed.
Chances are that if you are try running your current fan with the bathroom door cracked open a bit and see if performance does not markedly improve.
The cubic feet per minute ranking is specified on each brand of the bathroom fan's size need to be selected depending on your size of bathroom space. Selecting the right size fan for your bathroom's square footage ensures that you'll get the right amount of ventilation in the space. Designer styled white polymeric grille complements virtually any decor. I'm having trouble choosing the cfm for a new bathroom fan.