IAFF advocates photoelectric smoke detectors over ionization detectors

The International Association of Fire Fighters (IAFF) said federal and provincial officials should require that all relevant building standards and codes developed in the United States and Canada include a mandate for the use of photoelectric smoke detectors.

"More than 3,000 people die each year in the United States. and Canada in structure fires, and we need to do everything we can to reduce that number. Using better smoke detectors will drastically reduce the loss of life among fire fighters and citizens because it will mean earlier detection of fires and result in faster response by emergency crews," IAFF General President Harold A. Schaitberger said.

Research has demonstrated that photoelectric smoke detectors are more effective at warning people of smoke from smoldering fires than ionization smoke detectors. With earlier warning, people have more time to escape a burning structure. Photoelectric smoke detectors are less susceptible to nuisance alarms. To prevent nuisance alarms, citizens often disable smoke detectors and place themselves, other residents in a home or building and fire fighters at great risk.

Photoelectric smoke detectors contain a light source and a light-sensitive electric cell. Smoke entering the detector deflects light onto the light-sensitive electric cell, triggering the alarm. These detectors are more sensitive to large particles given off during smoldering fires--the kind of fires that occur at night when people are asleep.

Ionization smoke detectors have a small amount of radioactive material, and establish a small electric current between two metal plates, which sound an alarm when disrupted by smoke entering the chamber. But the technology leads to a delayed warning. That can lead to greater loss of life among people in a burning structure and fire fighters, who are faced with a more developed fire. A delayed warning during a smoldering fire, especially at night, can incapacitate people who are sleeping and lead to death as fire spreads. No home should be without a smoke detector, and ionization detectors should continue to be used until a home can be equipped with photoelectric detectors.

More: www.iaff.org

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