Bathroom Fan Sizing
If you have an unusually shaped bathroom it might be easier to draw out your floor plan and label each wall to keep track of your dimensions.
Bathroom fan sizing. Coming in at 115 cfm the broan l100mg ventilation fan. Ft in the room. When installing a vent fan make sure there s at least a 1 2 gap under the bathroom door to allow fresh air to enter the room when the fan is running. Bathroom vent fan capacity is measured in cfm cubic feet per minute of air that the fan can move.
If your bathroom has an 8 ceiling the cfm rating for your fan should be as least as high as the number of square feet 5 x 7 35 sq. An effective bathroom fan should be capable of replacing the entire volume of air 8 times per hour or every 7 5 minutes. Sizing for large bathrooms. To arrive at your required cfm simply divide your bathroom s volume by 7 5.
Simply enter the dimensions of your bathroom in the calculator below to determine the minimum size vent fan you need for the bathroom in your home. Choosing the right cfm size for a bathroom exhaust fan standard fan sizing. The higher the bath fan rating the more air can be vented out of the bathroom which means less moisture and mold build up. Keep in mind that the cfm capacity of a bathroom vent fan will be reduced by long or irregularly exhaust ducting.
How to size an exhaust fan for a bathroom measure the dimensions of your bathroom. Hi tam bathroom vent fans are rated by the cubic feet per minute cfm of air they move and should be sized to replace the air in the room at least eight times an hour. The bath fan calculator is standard guide to help you find the minimum fan rating for your specific bathroom. Determine the required cfm for your bathroom fan.
Other options for bath fans include lights heaters and even humidity sensors. For bathrooms over 100 square feet exhaust fans can be sized according to the number of. Bathroom vent fan capacity vent fan noise suggestions fan capacity measured in cfm. Continue shopping bath exhaust.
So in your case a 50 cfm fan should work. Bathroom vent fans are rated for the amount of air they can move measured in cubic feet per. Use our handy online calculator to see what size vent fan you need for your home.