Kidde Hd135 Heat Detector With Thermal Sensor (Ac/Dc)

This Heat Detector responds to temperature, rather than smoke, when temperatures rise above 135 F. It also interconnects with up to 24 devices. Designed for use in kitchens and furnace rooms, because they reduce nuisance alarms caused by cooking fumes or high humidity and should be used to supplement smoke alarms, as they may not always detect slow, smoldering low-heat-producing fires and fires that are in a different room from the heat alarm. Five-year limited warranty. UL listed.