Customer Reviews For The Hardwire Combo Smoke and Carbon Monoxide Alarm with 10-Year Battery Backup

This hardwired combination smoke and carbon monoxide alarm runs on standard 120V AC household power and features dual-sensor technology to sense both fire and toxic carbon monoxide (CO) gas in a single unit. The USI/SMCO-HW10YR-P utilizes Sensing Plus multi-criteria detection to identify fast-flaming fires, slow-smoldering fires, and dangerous CO leaks, while an integrated 10-year battery backup ensures uninterrupted protection during power outages.

Yes. This hardwired combination smoke and carbon monoxide detector supports multi-station interconnectivity with up to 24 compatible USI devices (including up to 18 smoke alarms). When connected via your home's 120V electrical wiring, if one unit detects smoke or carbon monoxide, all interconnected hardwired combination alarms sound simultaneously throughout the entire house to alert occupants quickly.

Yes. Engineered to meet modern UL 217 (9th Edition) and UL 2034 safety standards, the unit's multi-criteria smart sensors are specifically calibrated to distinguish between real fire threats and routine nuisance triggers like steam, humidity, or everyday cooking smoke, drastically reducing false alarms in kitchen and hallway areas.

Turn off electricity at your main circuit breaker, remove the old mounting bracket, and connect the included quick-connect wiring harness (line, neutral, and interconnect wire) to your electrical junction box. Twist the new hardwired combination smoke and carbon monoxide alarm onto its base. The sealed 10-year battery backup will activate automatically upon installation.