Carbon monoxide (CO) is a by-product of incomplete combustion. CO is invisible, odourless and colourless. Exposure to CO can cause flu-like symptoms such as headaches, nausea, dizziness, burning eyes, confusion, drowsiness and loss of consciousness. In severe cases, CO poisoning can cause brain damage and death.
Proper installation and maintenance of working CO alarms are important to alert you to CO so you can take appropriate action to stay safe.
You must install a carbon monoxide alarm beside each sleeping area in a residential suite if you have a fuel-burning appliance or a fireplace installed.
Note: There are additional requirements for installing CO alarms in multi-unit buildings (i.e apartment buildings). Please get in touch with the Kingsville Fire Department if you have questions about installing CO alarms.
New Provincial Requirements as of January 1, 2026
The Ontario Fire Code has expanded carbon monoxide alarm requirements for existing homes. As of January 1, 2026, the following additional rules apply:
1. CO alarms are required on every storey of a home.
This includes all levels, even if a storey does not contain a sleeping area.
2. Homes with heating air supplied from a fuel-burning appliance located outside the home must also have CO alarms.
This includes systems that supply heated air from an appliance located in a utility shed or other outbuilding.
3. These changes apply to all existing homes with any of the following:
- A fuel-burning appliance (natural gas, propane, oil, or wood)
- A fireplace
- An attached garage
- New: A fuel-burning appliance located outside the home, supplying heated air
Residents with questions about CO alarm placement or compliance are encouraged to contact the Kingsville Fire Department for guidance. Review Section 2.16 of Division B of the Fire Code (O. Reg. 213/07) for more details.