Smoke Detectors
How Many Smoke Alarms Per Square Foot?
How many smoke alarms per square foot? Learn why codes count alarms by room and level, not floor area, and how to space them in a typical home.
Pick the right smoke and carbon monoxide alarms for your house
Clear guides to smoke detectors, CO detectors and combination alarms from Kidde, First Alert and X-Sense. Start with the kind of alarm you need, the one you're replacing or the beep that won't stop.
Latest guides
Smoke Detectors10-Year Battery vs AA Smoke Detector
Smoke detector 10 year battery vs AA battery: compare sealed lithium alarms with replaceable AA models, then pick the setup that fits your home.
Hardwired, Wireless and Smart AlarmsDo Hardwired Smoke Alarms Have Batteries?
Do all hard wired smoke alarms have batteries? Most do, as backup power for outages. Here's how backup works and what to check.
Smoke DetectorsBest First Alert Smoke Detectors
Looking for the best First Alert smoke detector? Compare hardwired, battery and combination models by sensor, backup power and interconnect support.
- Smoke Detectors
Are 10-Year Smoke Detectors Reliable?
Are 10-year smoke detectors reliable? Learn what a sealed battery can and cannot tell you, how to maintain an alarm, and what to check before buying.
Smoke DetectorsBest Battery-Operated Smoke Detectors
Compare battery operated smoke detectors by battery life, sensing, and connectivity. Find a standalone, interconnected, or smart alarm for your home.
- Hardwired, Wireless and Smart Alarms
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.
Carbon Monoxide DetectorsBest Plug-In Carbon Monoxide Detectors
Compare the best plug in carbon monoxide detector picks by display, backup power and smart alerts. Find the right fit for your outlets and rooms.
Hardwired, Wireless and Smart AlarmsBest Smart Smoke Detectors and App Alarms
Compare smart smoke detectors with app alerts for smoke, carbon monoxide and low batteries. Find battery and hardwired options for your home.