Smoke and CO Combination Alarms
Best Wired Smoke and Carbon Monoxide Detectors
Find the best wired smoke and carbon monoxide detector for your home. Compare hardwired combo alarms with battery backup, voice alerts and interconnect limits.
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
Carbon Monoxide DetectorsDo Plug-In Carbon Monoxide Detectors Work?
Do plug in carbon monoxide detectors work? Yes, they sense CO and sound an alarm, and a battery backup keeps them guarding during outages.
Smoke and CO Combination AlarmsAre Combination Smoke and CO Detectors Good?
Are combination smoke and CO detectors good? Yes for most homes, but placement matters. Here's when one unit beats two and where to put it.
Carbon Monoxide DetectorsHow to Choose a Carbon Monoxide Detector
How to choose a carbon monoxide detector: match power source, sensor type, display and alarm features to your household, rooms and outage risk.
Smoke DetectorsHow 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.
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.