What Size Should My Bathroom Ventilation Fan Be? 07/28/2017Everyday tasks like showering, bathing and shaving can put home-harming humidity into the air in your Bossier City home. There’s good news though—a simple bathroom ventilation fan can protect you from warped wood, mold growth, damaged 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 proper size? Are they as quiet and energy efficient as they could be? Brooks Heating and Air Conditioning is here to answer your questions. Today’s bathroom ventilation fans are small and sleek and they run more quietly and effectively 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 prevent warmed air from getting out through your ventilation. While you can find a lot of bells and whistles to pick from, the most imperative aspect 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 replace 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 about the number of square feet in your bathroom. So, if your bathroom is 5 feet by 8 feet, a CFM rating of 40 would be sufficient. If you have a higher ceiling, the equation gets a little more complicated. 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 follow HGTV’s guidance 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 unsure if your bathroom ventilation fan is the right size, or you know it’s come to the point for a new one, give the professionals at Brooks Heating and Air Conditioning at call at 800-COOLING. We’re here to help you ensure you have a ventilation fan that will work hard to care for your home and keep it comfy. You can even schedule an appointment with us online if that’s the most straightforward for you.