Starting January 1, 2026, Ontario is updating the Fire Code to require carbon monoxide (CO) alarms on every storey of a home, including basements, if there is a fuel-burning appliance, fireplace, or attached garage. Most existing detectors should be replaced every 10 years as well.
https://www.ontario.ca/page/carbon-monoxide-safety?fbclid=IwZnRzaAO2Eq1leHRuA2FlbQIxMQBzcnRjBmFwcF9pZAo2NjI4NTY4Mzc5AAEeQ2ZUIxIncDtSUewTM0w7552EBKuKbs8FgwdQTxl3iKe-CXmruclqYOe8tHY_aem_jypDnJ4Ku3OZknQkYl8X8A