$33.98 at Lowe's “Both types of alarms are designed to alert people to fire in time to get out safely,” McKelvey says. But because house fires can be flaming or smoldering, and you can’t ...

The products in question are two types of fixed-temperature fire detectors, numbering at 4,869, and two types of signal transmitters, of which there are 4,764 installed throughout the country.