New Carbon Monoxide Alarm Requirements in effect as of January 1

As of January 1, 2026 the Ontario Fire Code requires the installation of additional carbon monoxide alarms, regardless of building age. This new legislation applies to residential homes and care facilities served by a forced-air fuel-burning appliance not contained within the building.

What's changing?

• CO alarms will now be mandatory on every storey of all homes with a fuel-burning appliance, fireplace, or attached garage.

• There are also updated requirements for residential suites, care occupancies, and retirement homes.

• Alarms must meet updated Ontario Fire Code and be placed in key locations.

• Battery operated and plug-in carbon monoxide alarms are permitted

Why it matters:

• Carbon monoxide is a silent killer—colorless, odorless, and deadly. These updated rules are designed to keep families safe and save lives.

To learn more about the changes and carbon monoxide safety visit: www.ontario.ca/page/carbon-monoxide-safety