Home Carbon Monoxide Alarm Requirements in Ontario (2026 Update)
New Ontario Fire Code updates now require carbon monoxide alarms on every storey of homes with fuel-burning appliances or attached garages. Make sure your home is compliant and protected.
Based on updated guidelines from the Ontario Office of the Fire Marshal
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Required on every storey (2026 update)
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Mandatory with fuel-burning appliances or garages
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Install within 10m of sleeping areas
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Applies to most Ontario homes
What Changed in Ontario’s Carbon Monoxide Alarm Requirements in 2026
As of January 1, 2026, updates to the Ontario Fire Code have expanded where carbon monoxide alarms are required in residential homes. These changes are designed to improve safety and reduce the risk of carbon monoxide exposure by ensuring better coverage throughout the home.
New Requirements for Homeowners
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Carbon monoxide alarms are now required on every storey of the home
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Homes with fuel-burning appliances must have properly placed CO alarms
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Homes with attached garages must install carbon monoxide alarms
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Alarms must be located within 10 metres of sleeping areas
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Fully electric homes without garages are typically exempt
If your home uses natural gas, propane, wood, or any other fuel source, these updated requirements likely apply to you. Ensuring your carbon monoxide alarms are correctly installed is essential for both safety and compliance with Ontario regulations.
Where Carbon Monoxide Alarms Must Be Installed in Your Home
Proper placement of carbon monoxide alarms is just as important as having them installed. Under Ontario guidelines, alarms must be positioned to detect carbon monoxide quickly and effectively throughout the home.
Required Locations Include:
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On every level of the home, including basements
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Within 10 metres (about 33 feet) of all sleeping areas
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Near fuel-burning appliances such as furnaces, water heaters, and fireplaces
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In homes with attached garages, alarms must be installed to detect potential CO entry
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In a location where the alarm can be clearly heard while sleeping
Improper placement can reduce the effectiveness of your carbon monoxide alarms, even if they are installed.
Where Carbon Monoxide Alarms Must Be Installed in Your Home
There are several types of carbon monoxide alarms available, and choosing the right one depends on your home setup. All units must meet Canadian safety standards, but installation methods can vary.
Hardwired CO Alarms
Installed directly into your home’s electrical system, hardwired carbon monoxide alarms provide continuous protection and are often used in newer homes or during renovations.
✔ Reliable power source
✔ Can be interconnected
✔ Ideal for full-home coverage
Battery-Operated CO Alarms
Battery-powered units are easy to install and ideal for adding protection to areas without existing wiring.
✔ Easy installation
✔ Flexible placement
✔ Requires regular battery checks
Plug-In CO Alarms
These units plug directly into wall outlets and often include battery backup for added reliability.
✔ Quick setup
✔ Backup battery included
✔ Good for bedrooms and hallways
All carbon monoxide alarms installed in your home must meet approved safety standards such as CSA 6.19, ULC 218, or equivalent certifications.
Do You Need a Carbon Monoxide Alarm in Your Home?
Under Ontario regulations, most homes are required to have carbon monoxide alarms. If your home includes any fuel-burning appliances or an attached garage, these requirements likely apply to you.
You likely need CO alarms if your home has:
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A gas or propane furnace
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A water heater powered by gas or fuel
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A fireplace (gas or wood-burning)
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A gas stove or oven
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A fuel-burning dryer
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An attached garage, even if no appliances are inside
If you’re unsure whether your home meets current Ontario requirements, a professional inspection can confirm proper placement and compliance.
Professional Carbon Monoxide Alarm Installation & Compliance Checks
Ensuring your home meets Ontario’s carbon monoxide alarm requirements isn’t just about having alarms installed — it’s about having them installed correctly. Improper placement or outdated units can leave your home unprotected and non-compliant.
Our CO Alarm Services Include:
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Full home compliance inspections
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Proper alarm placement and installation
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Upgrading outdated or expired units
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Installation of hardwired, battery, or plug-in systems
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Ensuring compliance with Ontario Fire Code standards
We ensure your home meets current Ontario safety requirements while providing reliable protection for your household.
Serving homeowners across Fergus, Elora, Guelph, Orangeville, and surrounding areas.
Home CO Alarm Requirements FAQs
Make Your Home CO Alarm Compliant Today
Don’t leave your home’s safety to chance. Our team can inspect, install, and ensure your carbon monoxide alarms meet current Ontario Fire Code requirements.
Fast, reliable service backed by experienced professionals.
Ontario requirements have changed — make sure your home is up to date.