how long do carbon monoxide detectors last
A CO alarm will alert you before the CO concentration reaches an acute level. But CO alarms do not last forever. The detecting components will lose their effectiveness after 5 to 7 years and may no longer detect carbon monoxide. First Alerts website states: âAfter 5 years any detector should be replaced with a new CO alarm.â COSTAR recommends replacing their CO alarms every 6 years or sooner.