professional checking a bathroom ventilation fan

What Size Should My Bathroom Ventilation Fan Be?

Average tasks like showering, bathing and shaving can put home-damaging humidity into the air in your Grove City home. There’s good news though—a modest bathroom ventilation fan can protect you from warped wood, mold growth, cracked drywall and other trouble 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 quiet and energy efficient as they could be? Air Quality Solutions 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 hefty 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 avoid warmed air from getting out through your ventilation. While you have a lot of bells and whistles to pick from, the most imperative characteristic of your fan is whether or not it’s big enough to do its job.

Graded 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 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 easy, you can heed HGTV’s tips for bathrooms larger than 100 square feet – establish 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 right size, or you know it’s come to the point for a new one, give the professionals at Air Quality Solutions at call at 614-871-4144. We’re here to help you make sure you have a ventilation fan that will run hard to guard your home and keep it comfortable. You can even schedule an appointment with us online if that’s easiest for you.