You must have CO alarms outside each sleeping area in your home and on every floor level in residential and care occupancy buildings

By Gazette Staff

December 23rd, 2025

BURLINGTON, ON

CO is an odorless, colorless gas that can be deadly. You can’t see, hear, taste, or smell it, which is why it’s called the “silent killer.”

It’s the law: You must have CO alarms outside each sleeping area in your home and on every floor level in residential and care occupancy buildings with fuel-burning appliances, heating systems, fireplaces or attached garages. Apartment and condominium (multi-unit residential) and care occupancy buildings with attached garages or service rooms, CO alarms are required in each unit with a common wall, floor or ceiling with the garage or service room and in the service room. CO alarms are required in each public corridor where a forced-air fuel-burning appliance provides heated air (e.g. hallway of each floor).

Combination alarms that sense for smoke, fire and CO are available.
Buy alarms from trusted retailers that have certification markings to ensure they meet Canadian safety standards.
If the alarm sounds: Leave your home immediately and call 9-1-1.

Make sure outside vents are clear and not blocked, especially after heavy snowfall when snow can pile up and block them.
Install a CO alarm on every level of your home and next to sleeping areas.
Get your fuel-burning appliances inspected yearly.
Follow the manufacturer’s instructions for proper installation and maintenance.
Learn more about carbon monoxide safety and protect you and your family.