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2. Fire alarm system - Wikipedia

   en.wikipedia.org/wiki/Fire_alarm_system

   Residential fire alarm systems are commonplace. Typically, residential fire alarm systems are installed along with security alarm systems. In the United States, a residential fire alarm system is required in buildings where more than 12 smoke detectors are needed. [19] Residential systems generally have fewer parts compared to commercial systems.

3. Smoke detector - Wikipedia

   en.wikipedia.org/wiki/Smoke_detector

   Smoke detector mounted on a ceiling. A smoke detector is a device that senses smoke, typically as an indicator of fire.Smoke detectors/alarms are usually housed in plastic enclosures, typically shaped like a disk about 125 millimetres (5 in) in diameter and 25 millimetres (1 in) thick, but shape and size vary.

4. Home safety - Wikipedia

   en.wikipedia.org/wiki/Home_safety

   Fire alarms monitor the environmental changes associated with combustion. In most cases, once the alarm has been triggered by fire or smoke, a loud sound emanates to warn of danger or a message notifies the local fire department. Smoke alarms, also known as smoke detectors, generally sound an audible and visual alarm. Smoke alarms are usually ...

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6. Active fire protection - Wikipedia

   en.wikipedia.org/wiki/Active_fire_protection

   A common, residential smoke detector sounds an alarm when smoke is detected. Fire detection works using smoke or heat sensors. These systems are very effective tool at alerting people in the immediate vicinity of where the fire is detected but building regulations [9] require an integrated fire detection system.

7. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   Smoke and heat detectors protect from the risk of fire using different detection methods. Carbon monoxide detectors help protect from the risk of carbon monoxide poisoning. Although an intruder alarm panel may also have these detectors connected, it may not meet all the local fire code requirements of a fire alarm system.