Fire Administration (USFA) unless it's a unit equipped with a 10-year non-replaceable lithium-powered battery that will last the life of the alarm. ![]() In these cases, a battery-operated system not requiring the use of terminal boxes or wiring may be more appropriate, and will still remain in operation the event of a power outage, providing that the battery is good and regularly maintained.īut battery-powered units have the set-back to need immediate attendance when battery replacement is required, which should be once or twice a year according to U.S. In an older home, for instance, it’s not always possible to wire new cabling throughout most of the rooms in the house to set up a complete fire alarm system.
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