Exhaust Fan Size For Toilet

Here s how we get this number.

Exhaust fan size for toilet.

1007 rpm fan speed. 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 a standard 10ft by 10 ft bathroom with an 8 ft ceiling you will need an exhaust fan capable of 106 67 cfm. To arrive at your required cfm simply divide your bathroom s volume by 7 5.

Check the size of the exhaust port on the fan to make sure it fits your ductwork if applicable. 10 feet x 12 feet x 8 feet that computes to 960 cubic feet of air in the room. 45 watt 4 duct connector. A diameter of 4 inches is common for exhaust ducts but some high cfm fans fit a 6 inch diameter duct.

The formula to calculate bathroom exhaust fan size reads as follows. Double hanger bar system for ideal positioning. 10ft 10ft 8ft 7 5 106 67 cfm. Bathroom fan exhaust size calculator.

You multiply length times width times height. For example if your bathroom is 80. Otherwise use the appropriate calculation based on the room size. For bathrooms less than 100 square feet you can just go with 1 cfm for every square foot of floor area he says.

Cubic volume 7 5 cfm necessary. An effective bathroom fan should be capable of replacing the entire volume of air 8 times per hour or every 7 5 minutes. But o brian suggests a simpler rule of thumb. You now need to multiply 960 x 15.

Determine the required cfm for your bathroom fan. If your bathroom has a toilet or shower area enclosed by a door it s a good idea to install a separate exhaust fan for that area. If the enclosed space is small a 50 cfm fan should suffice. Includes built in 6w led light.