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First Alert 3120B

By: Carl Laron on April 04, 2017

Bottom Line The First Alert 3120B is a dual-sensor smoke detector that's effective in sounding a prompt alert regardless of whether you are dealing with a smoldering fire or a flaming blaze. It can be interconnected with other smoke detectors to warn residents throughout the house regardless of where it starts.
  • Good at detecting smoldering and blazing fires
  • Interconnectible with other First Alert alarms
  • Fewer complaints of nuisance alarms
  • Hardwired, so installation is more involved