Exhaust Fan Size For Toilet

For a standard 10ft by 10 ft bathroom with an 8 ft ceiling you will need an exhaust fan capable of 106 67 cfm.

Exhaust fan size for toilet.

An effective bathroom fan should be capable of replacing the entire volume of air 8 times per hour or every 7 5 minutes. To arrive at your required cfm simply divide your bathroom s volume by 7 5. You multiply length times width times height. You now need to multiply 960 x 15.

Bathroom fan exhaust size calculator. 10 feet x 12 feet x 8 feet that computes to 960 cubic feet of air in the room. A diameter of 4 inches is common for exhaust ducts but some high cfm fans fit a 6 inch diameter duct. 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.

Here s how we get this number. The tatsumaki ld 120 bathroom exhaust fan features standard size housing that fits between most ceiling joists. 120 cfm and 1 2 sones. Includes built in 6w led light.

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. 45 watt 4 duct connector. The formula to calculate bathroom exhaust fan size reads as follows. For bathrooms less than 100 square feet you can just go with 1 cfm for every square foot of floor area he says.

Determine the required cfm for your bathroom fan. Check the size of the exhaust port on the fan to make sure it fits your ductwork if applicable. For example if your bathroom is 80. 10ft 10ft 8ft 7 5 106 67 cfm.

If the enclosed space is small a 50 cfm fan should suffice. 1007 rpm fan speed. Cubic volume 7 5 cfm necessary. The minimum requirements say that this air should be changed 15 times an hour.