First Alert 3120B Review
Bottom LineFor the best protection, you'll want a dual-sensor smoke detector like the First Alert 3120B. It is interconnectable for whole house protection, and will sound a prompt alarm regardless of the type of fire.ProsRelatively free of false alarms, Photoelectric an ionization sensors to detect both flaming and smoldering fires, InterconnectableConsHardwired, so installation is harder than with battery-powered detectors
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