Commercial Bathroom Exhaust Fan Requirements

A fan that is too small will not effectively remove moisture from the room.

Commercial bathroom exhaust fan requirements.

Bathroom fans are rated like other types of exhaust fan by the amount of air movement or cfm they produce. All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans. Some signs of excessive uncontrolled bathroom moisture include. Bathroom window condensation and frost forming on bathroom windows during freezing.

A commercial restroom will require air to be changed 8 12 times an hour depending on the size of the facility and your local code. This can lead to serious problems including warped cabinetry fogged mirrors mold and or mildew growth. Sizing of your bathroom fan is very important and should produce at least 1 cfm for every square foot of the room. This is the industry standard.

Surprisingly bathroom fans are not required by some building codes. Limits the capacity of a home s two largest exhaust fans to a net total exhaust flow of 15 cfm 100 ft2. The illustration above demonstrates the use of a ceiling exhaust fan mounted in the rest room exhausting the stale air. Choose from a variety of exhaust fans fans with built in lights fan heater combinations and bathroom fan housing kits for contractors.

Local bathroom or kitchen fans that exhaust air outdoors and remove contaminants directly from the room where the fan is located also increase the outdoor air ventilation rate. We have bathroom fans and bathroom fan accessories including replacement fluorescent and halogen light bulbs plus bath fan upgrade kits that can reduce sound levels and boost air movement compared to older. Damaged bathroom window trim. Stains thermal tracking or mold growth on bathroom walls and ceilings possibly also on bath vanities and cabinets.

50 cfm intermittent or 20 cfm continuous operation 2006 irc 303 3x. Learn more about indoor air in homes and coronavirus covid 19. Mechanical exhaust is required and recirculation is prohibited except that recirculation shall be permitted where the resulting supply airstream consists of not more than 10 percent air recirculated from these spaces see section 403 2 1 items 2 and 4. This exhaust air can be routed either to the roof using ductwork and a roof vent or to the side of your building using ductwork and a hooded wall vent.

Ventilation in schools offices and commercial buildings. Exhaust required in each kitchen and bathroom. Exhaust fan must be strong enough to restore the bathroom with fresh air every 7 1 2 minutes or 8 times an hour.