Five Essential Facts You Need to Know About Carbon Monoxide Detectors
Key Maintenance and Replacement

CO detectors require regular maintenance to remain effective. Test the device monthly by pressing the test button and watching for the alarm to sound. Replace the batteries every six months, or as soon as the device's low battery indicator alerts you. Detectors themselves have a finite lifespan, typically between five and seven years, so replacment is essential at this point even if they seem to work perfectly-no device is 100% failproof.