Mar 10 2017

Portable Fire Extinguishers

Q: Are fire extinguishers required to be placed in mechanical rooms in our hospital? I’ve searched NFPA 10 and the Life Safety Code and haven’t found anything concrete. The mechanical rooms in our facility are strictly boiler rooms, electrical control panel rooms, and so on. They are considered restricted areas and are always kept locked, with access granted to just the facilities staff and the security staff. Any help you can provide is greatly appreciated.

A: Yes, according to sections and of the 2012 Life Safety Code, you must be in full compliance with NFPA 10 (2010 edition) for maximum travel distance to the location of a portable fire extinguisher, in all areas of your facility. Each classification of extinguishers has their own different requirements, as follows:

Class A Extinguishers

Maximum travel distance to extinguisher:                  75 feet

Maximum floor area for each extinguisher:               11,250 sq. ft.

Maximum floor rating per unit of ‘A’:                       3,000 sq. ft. for Light (Low) Hazard

1,500 sq. ft. for Ordinary (Moderate) Hazard

1,000 sq. ft. for Extra (High) Hazard


Class B Extinguishers

Light (Low) Hazard:

5-B                  30 feet maximum travel distance

10-B                50 feet maximum travel distance

Ordinary (Moderate) Hazard:

10-B                30 feet maximum travel distance

20-B                50 feet maximum travel distance

Extra (High) Hazard:

40-B                30 feet maximum travel distance

80-B                50 feet maximum travel distance

Class C Extinguishers

Class C fires are started with electrical current, but the actual fuel that burns is either a Class A or a Class B hazard. Therefore, Class C extinguishers should be mounted and located according to either Class A or Class B requirements, depending on the potential fire.

Class K Extinguishers

Maximum travel distance is 30 feet.

Even mechanical rooms where very few people have access are required to be protected with portable fire extinguishers, so make an assessment of what the potential fuel that could catch on fire, and obtain the classification of extinguisher(s) that meets that potential fuel, and space them out accordingly.