Exhaust Fan Size For Toilet

A second fan may be needed.

Exhaust fan size for toilet.

For bathrooms less than 100 square feet you can just go with 1 cfm for every square foot of floor area he says. How to choose one. For example if your bathroom is 80. An effective bathroom fan should be capable of replacing the entire volume of air 8 times per hour or every 7 5 minutes.

The room s size measured in m3 is the most important factor to determine which exhaust fan is suitable for your toilet. The formula to calculate bathroom exhaust fan size reads as follows. Here s how we get this number. By simply inputting into the calculator the dimensions of your room and the type of room application for the fan the calculator will provide you with a suggested general capacity range in cubic metres per hour m3 hr to help narrow down your exhaust.

Bathroom fan exhaust size calculator. Why you need to have the proper size extractor fan. This page is designed to be a general guide for selecting an exhaust fan based on the size of the room and the type of application the fan will be used for. This fan is described as a sanity saver by homeowners fed up with noisy bathroom exhaust fans.

Industry experts recommend 60 cfm to 80 cfm for small bathrooms and 200 to 300 cfm for a large bathroom with a steam generator. Otherwise use the appropriate calculation based on the room size. 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. The calculator on this page is provided as a general guide designed to help you select an exhaust fan which may be suitable for your needs.

10ft 10ft 8ft 7 5 106 67 cfm. You can upgrade to a larger diameter duct for greater efficiency or you can use an adapter reducer often included with the fan to fit the smaller duct. Because toilets are usually in small rooms a small quiet exhaust fan should do the trick. Determine the required cfm for your bathroom fan.

Just remember that the fan needs airflow to do its job. 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. But o brian suggests a simpler rule of thumb.

Cubic volume 7 5 cfm necessary. To arrive at your required cfm simply divide your bathroom s volume by 7 5. The fan model its size and cfm rating or the required or design flow rate in cfm from your local code such as 60 or 80 cfm. Of course this depends on your circumstances so we recommend using our simple exhaust fan calculator to decide which fan you need.

With a power level of 70 cubic feet per minute cfm this fan will handle bathrooms up to 70 square feet in size.