05/30/2026
🚨 Running Your Air Conditioner? Don't Forget About Carbon Monoxide Safety 🚨
As temperatures rise, many people are closing windows and running their air conditioners around the clock. While air conditioners do not produce carbon monoxide (CO), the way we cool our homes can sometimes increase the risk of exposure to this deadly gas.
🏠 Central air conditioners circulate and cool indoor air and do not create carbon monoxide. However, because central AC systems keep homes tightly closed and may operate alongside furnaces, boilers, or other fuel-burning appliances, problems with venting or appliance exhaust can go unnoticed for longer. In some cases, HVAC systems can also distribute carbon monoxide throughout a home if the gas enters the ductwork.
🪟 Portable and window air conditioners also do not produce carbon monoxide, but they can affect airflow and pressure within a home. Improper installation, blocked vents, or nearby fuel-burning equipment can allow exhaust gases to enter living spaces.
⚠️ Carbon monoxide is a colourless, odourless gas produced by fuel-burning appliances, vehicles, generators, furnaces, water heaters, fireplaces, and other combustion equipment.
When homes are sealed up to keep cool air inside, carbon monoxide can build up more quickly if there is a problem with a fuel-burning appliance or if exhaust gases are being drawn indoors.
How to Stay Safe
✅ Install carbon monoxide alarms beside your furnace and water heater, on every level of your home and outside sleeping areas.
✅ Test CO alarms regularly and replace batteries as recommended.
✅ Have furnaces, water heaters, fireplaces, and other fuel-burning appliances inspected and maintained annually.
✅ Ensure all vents, chimneys, fresh-air intakes, and exhaust pipes are clear and unobstructed.
✅ If you have central air conditioning, ensure HVAC filters are changed regularly and have your entire heating and cooling system inspected by a qualified technician.
✅ Never operate generators, BBQs, propane appliances, or gas-powered equipment inside garages, sheds, or windows, doors, or air conditioner intakes.
✅ Never idle vehicles in attached garages—even with the door open
✅ Ensure portable air conditioners are installed according to the manufacturer's instructions and ensure venting is installed correctly.
Know the Signs of Carbon Monoxide Poisoning
🚨 Headache
🚨 Dizziness
🚨 Nausea
🚨 Weakness or fatigue
🚨 Confusion
🚨 Loss of consciousness
If your carbon monoxide alarm sounds:
➡️ Move everyone outdoors immediately.
➡️ Call 911 or your local emergency services.
➡️ Do not re-enter the building until it has been determined safe.
A working carbon monoxide alarm is your first line of defence against a hazard you can't see, smell, or taste.