Smoke and CO Detector Maintenance: Testing, Batteries, and Upgrades

Smoke alarms are present in 96% of U.S. homes , but the National Fire Protection Association (NFPA) reports that 3 out of 5 fire deaths occur in homes with no working smoke alarms or no smoke alarms at all. The gap between "installed" and "working" is where lives are lost — and it's almost entirely a maintenance problem.

Carbon monoxide detectors face similar neglect. CO poisoning kills over 400 Americans annually and sends 50,000 to emergency rooms. Many of these incidents occur in homes where detectors were present but had dead batteries, expired sensors, or improper placement.

This guide provides a complete maintenance framework for smoke and CO detectors — the most important life-safety systems in your home systems portfolio .