Bathroom Exhaust Fan Size Chart

If your bathroom is larger than 100 square feet tally the cfm requirements for the individual fixtures to estimate your needs.

Bathroom exhaust fan size chart.

Here is where they are put to use. The following data should help you in determining the cfm capacity of a fan for a specific room. Use our handy online calculator to see what size vent fan you need for your home. That s why we developed this handy bathroom vent fan cfm calculator.

There are minimum standards to follow. Toilet 50 cfm shower stall 50 cfm whirlpool 100 cfm 200cfm bathroom exhaust fan. Just add up the numbers below that correlate with each fixture in your bathroom to determine the appropriate fan size for the space. The values are easy to calculate.

Consider a stronger bath fan if your bathroom includes any of the following. Bathroom is 8 x5 with 8 ceilings. You can also install two or more individually controlled bathroom exhaust fans over different areas with combined cfm s equal to your calculation. The minimum allowed fan size is 50 cfm so if your bathroom is for example only 42 square feet you still need a 50 cfm fan.

Sizing an exhaust fan. 10ft 10ft 8ft 7 5 106 67 cfm. Cubic volume 7 5 cfm necessary. The formula to calculate bathroom exhaust fan size reads as follows.

For bathrooms between 50 and 100 square feet estimate approximately 1 cfm per square foot. Building code does not specify bathroom vent locations but in any size bathroom it is the most logical to install it over or as close as possible to the plumbing fixture that requires it. At 1 cfm per square foot the minimum recommendation is a fan rated at 40 cfm. Simply enter the dimensions of.

Here s how we get this number. Bathroom fan cfm guide. Below are examples of bath fan cfm ratings. For a standard 10ft by 10 ft bathroom with an 8 ft ceiling you will need an exhaust fan capable of 106 67 cfm.

Continue shopping bath exhaust fans to find a right fan for your budget size and style. Bathroom fan exhaust size calculator. Let s take a small kitchen for. Multiply 8 x 5 40 sq.

Vent fans are rated by the number of cubic feet of air they move per minute cfm and it s important to buy a large enough fan for the size of your bathroom. Making sure the bath fan is powerful enough for the bathroom is important to minimizing moisture and mold. Sizing for large bathrooms for bathrooms over 100 square feet exhaust fans can be sized according to the number of fixtures in the room. Bathroom area is 40 sq.

Multiply the bathroom floor area in square feet by 1 07. Before you install bathroom kitchen or garage exhaust fans start here to determine what you need to proceed for proper ventilation. Whirlpool tub steam shower high. The bath vent fan cfm capacity should be slightly more than the number of square feet of floor of the bathroom area being vented.