aZoned hard-wired smoke or heat detectors, with a local sounding device, are required in each "living area". When zoned hard-wired heat detectors are being replaced at the end of the heat detector’s life, they must be replaced with smoke detectors. 被分区的硬联线烟或热探测器,用一个地...
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120 V AC Hardwired Smoke Detector with 9 V capable Battery Backup: This mains-powered smoke detector will continue to function in the event of a power outage due to its replaceable 9 V battery backup, for uninterrupted protection of your home ...
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