What Size Should My Bathroom Ventilation Fan Be? 07/28/2017Everyday tasks like showering, bathing and shaving can put home-damaging humidity into the air in your Bossier City home. There’s good news however—a simple bathroom ventilation fan can keep you from deformed wood, mold growth, damaged drywall and other trouble associated with a humid bathroom. Even if you have ventilation fans in your bathrooms, do you know if they’re the proper size? Are they as noiseless and energy efficient as they could be? Central Aire Heating & A/C Inc is here to answer your questions. Today’s bathroom ventilation fans are small and modern and they work more quietly and economically than ever before. You’ll find a large range of selections, from classic fans that will get the job done to fans with integrated heat lamps, motion sensors and heat-exchanger ventilation that helps block warmed air from leaking through your ventilation. While you can find a lot of bells and whistles to pick from, the most important feature of your fan is whether or not it’s big enough to do its job. Assessed by the cubic feet per minute (CFM) of air they move, a bathroom ventilation fan should be able to replace the air in a bathroom at least eight times an hour. With a typical 8-foot ceiling, your ventilation fan should have a CFM rating about the number of square feet in your bathroom. Therefore, if your bathroom is 5 feet by 8 feet, a CFM rating of 40 would be satisfactory. If you have a higher ceiling, the equation gets a little more difficult. You’ll want to multiply the width of the room by its height and length, divide it by 60 and multiply by 8. Or, to keep it easy, you can use HGTV’s guidance for bathrooms larger than 100 square feet – establish your CFM requirements by adding 50 CFM for every toilet; 50 CFM for each shower, bath and combo; and 100 CFM for each whirlpool. If you’re unclear if your bathroom ventilation fan is the proper size, or you know it’s time for a new one, give the pros at Central Aire Heating & A/C Inc at call at 318-747-4965. We’re here to help you guarantee you have a ventilation fan that will run hard to guard your home and keep it comfy. You can even arrange an appointment with us online if that’s simplest for you.