When the voltage reaches a predetermined level, the alarm activates. Power Supply Batteries or household current can power residential smoke alarm. Battery models are also independent of house power circuits and will operate during power failures. It is critical that only the specific battery recommended by the alarm manufacturer be used for replacement. Smoke Alarm Location A smoke alarm in every room will provide the fastest detection.
Most fatal fires occur at night when people are asleep.
Often, victims never wake, due to carbon monoxide poisoning. A working smoke alarm will alert you, giving you precious time to escape. Installing a smoke alarm on every level of the living unit provides good all-around protection. Because smoke rises, they should be placed on or near the ceiling, according to your users manual. Under the Ontario Fire Code , every home in Ontario is required to have working smoke alarms installed between sleeping and living areas.