Cfm Bathroom Fan

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 1800 7 5.

Cfm bathroom fan. Two airflow options 130 or 150 cfm perfect for large rooms 130 to 150 sq ft quiet fan with less than 0 3 sones at 130 cfm and 0 3 sones at 150 cfm ul listed for over a tub or shower enclosure when gfci protected. Bathroom vent fans serve an important function by removing humid air from your home to prevent mold and mildew from forming. Whisper choice exhaust fan for large rooms with pick a flow speed selector 1 fan with 2 cfm choices.

For bathrooms that are larger select a fan that can move at least 1 cfm per square foot of room. The result is the cfm or cubic feet per minute rating required for your bathroom fan. For bathrooms 50 square feet and smaller it is recommended you purchase a bath fan designed for small rooms which will typically have a cfm range of 50 79.

To arrive at your required cfm simply divide your bathroom s volume by 7 5. Vent fans are rated by the number of cubic feet of air they move per minute cfm and it s important to buy a large enough fan for the size of your bathroom. Determine the required cfm for your bathroom fan.

Other options for bath fans include lights heaters and even humidity sensors. The higher the bath fan rating the more air can be vented out of the bathroom which means less moisture and mold build up. Most fans are rated from 50 to 110 cfm.

The cfm represents the airflow required to completely exchange the air in your bathroom 8 times in one hour.