Bathroom Exhaust Fan Sizing

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.

Bathroom exhaust fan sizing. Bathroom fan exhaust size calculator. Just remember that the fan needs airflow to do its job. Bathroom extractor fans are mandatory in any bathroom without a window and still highly recommended in bathroom with windows. The fan pulls air out of the bathroom and allows fresh air to be drawn in.

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. Otherwise use the appropriate calculation based on the room size. Read on to find out more. Bathroom exhaust fan duct length specifications.

Well managed indoor air quality is crucial to code compliance. Here we provide specifications for recommended minimum maximum duct lengths for bathroom vent fans. 1007 rpm fan speed. The fan and light operate separately or together and are housed in a classic white design that complements any decor.

The formula to calculate bathroom exhaust fan size reads as follows. A bath vent fan duct that is too long may restrict air flow such that the fan is not functional. A bath vent fan duct that is too short may violate the manufacturer s installation instructions may not work properly or may be drafty. Includes built in 6w led light.

The nutone white 50 cfm exhaust bath fan the nutone white 50 cfm exhaust bath fan with light combines efficient air circulation and up to 100 watts of illumination in one easy installation. Our installer friendly energy star ventilation solutions help you design beyond code without compromising interior aesthetics. This keeps the moisture from the shower bath or sink from encouraging mold growth. A large bathroom with a jetted tub a toilet and a shower a common configuration in new homes would need a 200 cfm ventilation fan such as the broan l200 ventilation fan available from.

If the enclosed space is small a 50 cfm fan should suffice. Cubic volume 7 5 cfm necessary. A second fan may be needed. The tatsumaki ld 120 bathroom exhaust fan features standard size housing that fits between most ceiling joists.

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. 45 watt 4 duct connector. A bathroom fan is an essential piece of hardware in any indoor bathroom without a window. Tam asks what size exhaust fan should we use in our small bathroom if your bathroom has an 8 ceiling the cubic feet per minute cfm rating for your fan should be as high or higher than the number of square feet in the room.

Double hanger bar system for ideal positioning.