Tips to Prevent Carbon Monoxide Poisoning

Carbon monoxide (CO) is often called the “silent killer” — and for good reason. This toxic gas is invisible, odorless and tasteless — making it nearly impossible to detect without proper alarms. It forms when fuel-burning appliances like furnaces or stoves aren’t working properly. With the right alarms and a few simple habits, you can keep your home safe and protect your family. 

Symptoms of carbon monoxide poisoning

CO poisoning happens when the gas builds up in your body and pushes out the oxygen you need to function. Early symptoms feel a lot like the flu — headaches, dizziness, nausea and feeling confused. And in some severe cases, exposure can lead to loss of consciousness or even death. That’s why it’s important to catch the signs early and act fast. 

How to prevent carbon monoxide poisoning

1. Install carbon monoxide alarms 

A carbon monoxide detector is your first line of defense. If your home has fuel-burning appliances, a fireplace or an attached garage, CO alarms are required. Place one on every level of your home and near each bedroom so it can alert you while you sleep. Test alarms monthly, change the batteries yearly and replace the alarm every 5 to 7 years.

2. Keep fuel-burning appliances in check 

Have your furnace, fireplace, water heater and gas stove inspected by a professional once a year. A quick check-up can catch any leaks, blockages or any issues that could release carbon monoxide into your home. 

3. Ensure proper ventilation

Make sure your home’s vents or chimneys aren’t blocked by snow, leaves or even debris. Also, never run a car or gas-powered tool inside a closed garage — even for a few minutes — as CO can accumulate quickly. 

4. Use generators safely

If the power goes out, only use your generator outside — at least 20 feet from your home’s windows, doors and vents. CO can sneak in quickly if it’s too close. 

5. Know the warning signs

If you or your family start feeling dizzy, short of breath or unusually tired while indoors — that could be due to carbon monoxide. Don’t ignore these signs — get fresh air immediately and call 911 for help. 

Update on Ontario’s CO Alarm Requirements

Starting January 1, 2026, the Ontario Fire Code will require additional carbon monoxide alarms in homes regardless of building age. 

• CO alarms will be mandatory on every story of your home if you have any fuel-burning appliance, fireplace or an attached garage. 

• The rules apply to residential homes, suites, care facilities and retirement homes. 

• You can use battery-operated or plug-in alarms, as long as they meet the updated Ontario Fire Code and are installed in the right locations. 

A few small steps can make a big difference when it comes to carbon monoxide poisoning. From alarms to annual check-ups, it all adds up to a safer home. Don’t wait until it’s too late. 

Meet with a licensed expert or if you already have a heating maintenance plan and would like to book an appointment visit: