Cfm Of Bathroom Fan

The effectiveness of the fan will be rated in cfm or cubic feet per minute of air moved.

Cfm of bathroom fan.

A fan that s too small won t remove moisture and odors efficiently and will need to run longer increasing wear on the motor. If you want need. So if you have a bathroom that is 12 feet long 15 feet wide and 10 feet tall then it has a volume of 1800 cubic feet 12 x 15 x 10 and a cfm of 240. Learning how to calculate cfm for a bathroom fan will help you purchase the right size fan for your space.

Standard fan sizing. To be effective a bathroom fan needs to be powerful enough to completely replace the air in the room about 8 times every hour. Bathroom vent fans serve an important function by removing humid air from your home to prevent mold and mildew from forming. To meet energy star minimum standards a bathroom fan must have an efficacy level of at least 1 4 for small fans up to 89 cfm and a level of at least 2 8 for larger fans 90 to 500 cfm.

A bathroom exhaust fan that is rated 50 cfm is ok to use in bathrooms that are 50 square feet or smaller. The hampton bay 80 cfm exhaust fan will reduce moisture in your bathroom to help prevent mildew while running at 2 0 sones. The cfm rating measures the volume of air the fan moves. Use the room size to determine the necessary cubic feet per minute cfm rating of the fan.

Make sure the fan you choose is powerful enough to ventilate your bathroom. The cfm number should be equal to or higher than the listed square footage of the bathroom an exhaust fan is being installed in i e. The result is the cfm or cubic feet per minute rating required for your bathroom fan. A large bathroom with a jetted tub a toilet and a shower a common configuration in new homes would need a 200 cfm ventilation fan such as the broan l200 ventilation fan available from.

The exhaust fan is designed to manage airflow in bathrooms as large as 85 sq. The rule of thumb is that you need at least 1 cfm per square foot of room area. Once you know the minimum recommended cfm requirement compare that with the cfm rating of your existing fan. Standard fan sizing applies to bathrooms that are 100 square feet or less.