The YoLink Water Leak Sensor 4 is our new top pick ... Kidde is best known for its smoke alarms, and the Water Leak + Freeze Detector borrows more than a few design cues from the company ...

Fasten the new smoke detector mounting plate to the remodeling box with a screwdriver. Strip 3/4-inch of insulation from the ends of the wires. Use wire nuts to connect the stripped NM cable wires ...

Run the initial 14-gauge two-wire cable to the first smoke detector location and about 10 inches into the hole. The power source for this first wire can be the electric service panel, a wall ...

The dual-sensor smoke detector from SimpliSafe received top scores for detecting both flaming and smoldering fires. It's battery-operated, which means you won't need a professional to hard wire it.