What Size Should My Bathroom Ventilation Fan Be? 07/28/2017Ordinary tasks like showering, bathing and shaving can put home-harming humidity into the air in your Augusta home. There’s good news however—a straightforward bathroom ventilation fan can save you from warped wood, mold growth, broken drywall and other problems associated with a humid bathroom. Even if you have ventilation fans in your bathrooms, do you know if they’re the right size? Are they as noiseless and energy efficient as they could be? Sig Cox Heating and Air Conditioning is here to answer your questions. Today’s bathroom ventilation fans are small and smooth and they run more quietly and economically than ever before. You’ll find a great range of selections, from classic fans that will get the job done to fans with fitted heat lamps, motion sensors and heat-exchanger ventilation that helps prevent warmed air from leaking through your ventilation. While you have a lot of bells and whistles to select from, the most imperative characteristic of your fan is whether or not it’s full-sized enough to do its job. Rated by the cubic feet per minute (CFM) of air they push, a bathroom ventilation fan should be able to swap out the air in a bathroom at least eight times an hour. With a standard 8-foot ceiling, your ventilation fan should have a CFM rating at least as high as the number of square feet in your bathroom. Thus, if your bathroom is 5 feet by 8 feet, a CFM rating of 40 would be adequate. If you have a larger 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 straightforward, you can follow HGTV’s tips for bathrooms larger than 100 square feet – establish your CFM requirements by toting 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 correct size, or you know it’s come to the point for a new one, give the pros at Sig Cox Heating and Air Conditioning at call at 706-722-5304. We’re here to help you make sure you have a ventilation fan that will drive hard to guard your home and keep it comfortable. You can even arrange an appointment with us online if that’s the most straightforward for you.