Commercial Bathroom Exhaust Requirements

Standard 2 1 2013 requires an exhaust rate of 0 cfm 3 s per ater closeturinal here long periods of heavy use are expected to occur e g restrooms in theatres schools and sports facilities and 0 cfm 2 s in other applications such as ofce buildings.

Commercial bathroom exhaust requirements.

Bathroom exhaust fan venting code summary section r303 3. For simplicity and to be conservative the higher rate is often used for all applications. Bathrooms must have windows when this section is adopted by a community it essentially says that for venting purposes bathrooms must have windows that open. Stains thermal tracking or mold growth on bathroom walls and ceilings possibly also on bath vanities and cabinets.

Quick navigation general discussion top. Learn more about indoor air in homes and coronavirus covid 19. Limits the capacity of a home s two largest exhaust fans to a net total exhaust flow of 15 cfm 100 ft2. For ashrae s requirements for commercial restrooms.

Every bathroom requires an openable window that provides at least 1 5 square ft of air flow area when open 2006 irc 303 3 or mechanical type ventilation. 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. Damaged bathroom window trim. Bathroom window condensation and frost forming on bathroom windows during freezing.

Do they do it by the number of toilets or air changes per hour. 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. Exhaust required in each kitchen and bathroom. 50 cfm intermittent or 20 cfm continuous operation 2006 irc 303 3x.

Ventilation in schools offices and commercial buildings. May be continuous or intermittent occupant controlled with prescribed rates e clothes dryers must be vented to the outside or condensing dryers plumbed to a drain. 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. 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.

Where a source of contaminant is located within 10 feet 3048 mm horizontally of an intake opening such opening shall be located a minimum of 2 feet 610 mm below the contaminant source. The illustration above demonstrates the use of a ceiling exhaust fan mounted in the rest room exhausting the stale air. Ashrae restroom exhaust requirement.