Hard Wired Smoke Detectors With Battery Backup
Hard Wired Smoke Detectors With Battery Backup . Do hardwired smoke alarms need a special box? The hardwired smoke detectors attached to your home's electrical system have backup batteries to sound the alarm even if the power goes out. Gentex 9120 Photoelectric Smoke Alarm with Battery Backup Harris from www.harriscomm.com While hardwired units are the best choice for most homeowners, they sometimes begin an intermittent but incessant chirping. The hardwired smoke detectors attached to your home's electrical system have backup batteries to sound the alarm even if the power goes out. This means that even if one of the smoke detectors stops working, all the others will still sound an alarm.