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 East Hanover home. There’s good news though—a straightforward bathroom ventilation fan can save you from deformed 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 correct size? Are they as soft and energy efficient as they could be? Effective Service Group, LLC. is here to answer your questions. Today’s bathroom ventilation fans are small and sleek and they operate more quietly and effectively than ever before. You’ll find a great range of options, from average fans that will get the job done to fans with built-in heat lamps, motion sensors and heat-exchanger ventilation that helps block warmed air from leaking through your ventilation. While you have a lot of bells and whistles to select from, the most important feature of your fan is whether or not it’s full-sized 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 normal 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 larger 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 simple, you can heed HGTV’s guidance for bathrooms larger than 100 square feet – determine your CFM requirements by increasing 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 Effective Service Group, LLC. at call at 973-884-0065. We’re here to help you ensure you have a ventilation fan that will drive hard to guard your home and keep it cozy. You can even arrange an appointment with us online if that’s easiest for you.