
Best Hard-Wired Smoke Detector Replacements
Compare hard-wired smoke detector replacements for smoke-only and smoke-and-CO coverage. Check backup power, interconnect needs and fit before choosing.
Swapping out hardwired alarms, linking alarms without new wires, and app-connected alarms that alert your phone.

Compare hard-wired smoke detector replacements for smoke-only and smoke-and-CO coverage. Check backup power, interconnect needs and fit before choosing.

Compare smart smoke detectors with app alerts for smoke, carbon monoxide and low batteries. Find battery and hardwired options for your home.

Compare wireless interconnected smoke alarms for smoke-only or smoke and CO coverage. See how each set differs in sensors, battery, linking and controls.

First Alert SMI100-AC review: compare its six hardwired alarms, 9-volt backup, and interconnect support with 10-year backup alternatives.

This Kidde 20SA10 review covers hardwired power, 10-year battery backup, interconnect capability and key trade-offs, plus two First Alert alternatives.

Compare Kidde 20SA10 vs 20SD10 smoke alarms by power source, battery backup and interconnect capability to choose the right fit for your home.

Compare wired vs wireless smoke detectors by power, wiring, interconnection and upkeep. Find the right alarm setup for your home and replacement needs.