Carbon monoxide (CO)
General safety recommendations
- Test CO alarms every month by pressing the test button.
- Replace batteries every year.
- Replace CO alarms within the time frame according to the manufacturer's instructions.
- Ensure outside vents for all fuel-burning appliances are clear of debris including snow and ice.
- Never use barbecues and portable fuel-fired heaters/generators inside.
- Have fuel-fired appliances inspected annually by a professional to prevent CO build-up.
Learn more about staying safe and staying compliant on our carbon monoxide information page.
Updated: October 14, 2026
Published: September 29, 2026