What Size Should My Bathroom Ventilation Fan Be? 07/28/2017Average tasks like showering, bathing and shaving can put home-harming humidity into the air in your Wharton home. There’s good news however—a modest bathroom ventilation fan can save you from distorted wood, mold growth, broken drywall and other issues related with a humid bathroom. Even if you have ventilation fans in your bathrooms, do you know if they’re the correct size? Are they as noiseless and energy efficient as they could be? Faust Air Conditioning and Heating is here to answer your questions. Today’s bathroom ventilation fans are small and smooth and they work more quietly and efficiently than ever before. You’ll find a large range of options, 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 escaping through your ventilation. While you have a lot of bells and whistles to select from, the most critical aspect 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 push, a bathroom ventilation fan should be able to exchange 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 almost 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 taller 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 simple, you can follow 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 not sure if your bathroom ventilation fan is the proper size, or you know it’s the occasion for a new one, give the professionals at Faust Air Conditioning and Heating at call at 979-532-2511. 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 set up an appointment with us online if that’s simplest for you.