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 Redford home. There’s good news however—a modest bathroom ventilation fan can keep you from distorted wood, mold growth, broken drywall and other issues 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 quiet and energy efficient as they could be? Airtronic Heating & Cooling is here to answer your questions. Today’s bathroom ventilation fans are small and smooth and they work more quietly and economically than ever before. You’ll find a great range of selections, from average 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 escaping through your ventilation. While you have 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 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 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 straightforward, you can follow HGTV’s guidance for bathrooms larger than 100 square feet – verify 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 proper size, or you know it’s come to the point for a new one, give the professionals at Airtronic Heating & Cooling at call at 313-537-8111. We’re here to help you make sure 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 simplest for you.