Commercial Bathroom Exhaust Fan Required Code

Important nec bathroom regulations general lighting fan circuit required.

Commercial bathroom exhaust fan required code.

401 2 ventilation required every occupied space shall be ventilated by natural means in accordance with section 402 or by mechanical means in accordance with section 403. Well there s no specific building code requirement for the bathroom vent location exhaust fan installation. Each bathroom should have a circuit for lighting and an exhaust fan. 25 or 50 cfm ft for hotels motels resorts and dormitories and a slightly more modest 20 50 cfm for private dwellings.

According to the code this circuit may be a 15 amp circuit if it serves just lighting but it should be a 20 amp circuit if it is also serving a vent fan. This ventilation code specifies a bathroom exhaust airflow rate for toilet rooms and bathrooms not served by a window of adequate size of. The building is an office building with a 3 stall men s restroom. See icc table r1507 4 note.

There is a ventilation fan installed in the ceiling however it is not working. You can have it almost anywhere on the ceiling or wall floors are forbidden due to possibility of vent flooding. Ventilation requirements in building codes and therefore these standards are also included. Yes there is also a womens restroom but it isnt an issue.

Tables 2a and 2b lists key issues in the building codes that affect indoor quality in residential and commercial buildings respectively along with provisions of ashrae standards 62 2 for residential buildings and 62 1 for commercial buildings. Exhaust duct to terminate a minimum of 3 from any window. Bathroom exhaust fan venting code summary section r303 3. Required bathroom vent fan ventilation rate in cfm.

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. No windows or other natural ventilation. Building owner doesnt want to fix the fan says it isnt required.