Exhaust Fan Size For Toilet

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

Exhaust fan size for toilet.

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. Because toilets are usually in small rooms a small quiet exhaust fan should do the trick. For example if your bathroom is 80.

A diameter of 4 inches is common for exhaust ducts but some high cfm fans fit a 6 inch diameter duct. An effective bathroom fan should be capable of replacing the entire volume of air 8 times per hour or every 7 5 minutes. A second fan may be needed. But o brian suggests a simpler rule of thumb.

How to choose one. 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. Just remember that the fan needs airflow to do its job. Here s how we get this number.

Determine the required cfm for your bathroom fan. Industry experts recommend 60 cfm to 80 cfm for small bathrooms and 200 to 300 cfm for a large bathroom with a steam generator. If the enclosed space is small a 50 cfm fan should suffice. Bathroom fan exhaust size calculator.

To arrive at your required cfm simply divide your bathroom s volume by 7 5. 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. 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.

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. Cubic volume 7 5 cfm necessary. Otherwise use the appropriate calculation based on the room size. 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. For bathrooms less than 100 square feet you can just go with 1 cfm for every square foot of floor area he says. All you need to do is select the application from the dropdown enter the size of the room and we will provide you with a general capacity range m3 hr that you should be looking to achieve from the extraction fan. 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.

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