Exhaust Fan Size For Toilet

45 watt 4 duct connector.

Exhaust fan size for toilet.

To arrive at your required cfm simply divide your bathroom s volume by 7 5. 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. Bathroom fan exhaust size calculator.

For example if your bathroom is 80. 120 cfm and 1 2 sones. If the enclosed space is small a 50 cfm fan should suffice. 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.

Check the size of the exhaust port on the fan to make sure it fits your ductwork if applicable. You now need to multiply 960 x 15. A diameter of 4 inches is common for exhaust ducts but some high cfm fans fit a 6 inch diameter duct. The tatsumaki ld 120 bathroom exhaust fan features standard size housing that fits between most ceiling joists.

Here s how we get this number. The minimum requirements say that this air should be changed 15 times an hour. Includes built in 6w led light. Otherwise use the appropriate calculation based on the room size.

Determine the required cfm for your bathroom fan. 10 feet x 12 feet x 8 feet that computes to 960 cubic feet of air in the room. An effective bathroom fan should be capable of replacing the entire volume of air 8 times per hour or every 7 5 minutes. You multiply length times width times height.

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. Cubic volume 7 5 cfm necessary. Double hanger bar system for ideal positioning. 10ft 10ft 8ft 7 5 106 67 cfm.