Ontario Office of the Fire Marshal
🚨 ATTN: Homeowners and Landlords! 🚨
Effective January 1, 2026
New carbon monoxide (CO) alarm rules are coming for existing homes — including detached and semi-detached houses, townhomes, and cottages.
💨 You must have carbon monoxide alarms if:
• You have a fireplace
• You have a fuel-burning appliance (like a furnace, water heater, or stove)
• You have heated air that comes from a fuel-burning appliance not located inside your home
📍 Where to install CO alarms:
• Adjacent to each sleeping area (near all bedrooms)
• On every storey of your home, even storeys without bedrooms
🔑 Who’s responsible?
• Homeowners – for owner-occupied homes
• Landlords – for rental properties
✅ Choose alarms with a recognized certification mark (CSA, ULC, or ETL) and follow the manufacturer’s installation instructions.
Protect your family from the “silent killer.” Check your CO alarms now and get ready for the new requirements!
👉 For more info, contact your local fire department or visit Ontario.ca/CarbonMonoxide