#AskMike No ventilation fan in my bathroom. Can I install one? A ventilation fan is necessary for your bathroom-it will help prevent moisture-related problems, such as the growth of mold and mildew. Bathroom vent fans are rated by how many CFM (cubic feet of air they can move in one minute). What size fan do you need? Multiply the room's square footage by 1.1. Panasonic North America | Mike Holmes

How To Install A Bathroom Fan And Exhaust