Exhaust Fan Size For Bathroom

But o brian suggests a simpler rule of thumb.

Exhaust fan size for bathroom.

Higher ceilings would require a larger fan. An effective bathroom fan should be capable of replacing the entire volume of air 8 times per hour or every 7 5 minutes. Sizing for large bathrooms for bathrooms over 100 square feet exhaust fans can be sized according to the number of fixtures in the room. For example a bathroom with a volume of 1000 cubic feet 28 3 cubic meters needs a fan capable of moving 1000 7 5 or 133 cfm 3 8 cubic meters per minute.

For bathrooms less than 100 square feet you can just go with 1 cfm for every square foot of floor area he says. Some manufacturers recommend the number of cfms based on square feet or cubic feet. For example for a 50 79 sq. Small room bath fans perfect for a modest sized bath or powder room.

10ft 10ft 8ft 7 5 106 67 cfm bathroom fan exhaust size calculator. Choose a fan that can move at least 1 cfm per square foot of room. For example for a 50 79 sq. Choose a fan that can move at least 1 cfm per square foot of room.

For example if your bathroom is 80. Bathroom select a fan with a 50 to 80 cfm rating. If your bathroom is larger than 100 square feet tally the cfm requirements for the individual fixtures to estimate your needs. Small room bath fans perfect for a modest sized bath or powder room.

Broan surfaceshield vital vio powered exhaust fan w led light antibacterial light. The minimum allowed fan size is 50 cfm so if your bathroom is for example only 42 square feet you still need a 50 cfm fan. Determine the required cfm for your bathroom fan. Here s how we get this number.

Read on to find out more. To arrive at your required cfm simply divide your bathroom s volume by 7 5. Bathroom select a fan with a 50 to 80 cfm rating. For bathrooms between 50 and 100 square feet estimate approximately 1 cfm per square foot.

A 50 square foot or smaller bathroom needs a 50 cfm fan. For a standard 10ft by 10 ft bathroom with an 8 ft ceiling you will need an exhaust fan capable of 106 67 cfm. Length x width square feet length x width x height cubic feet.