Infographic: Carbon monoxide

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Organization: Health Canada

Published: 2025

Carbon Monoxide (CO)

Carbon monoxide is a gas produced when you burn any type of fuel

Who is at risk?

Anyone is at risk

Typical sources of carbon monoxide include items like:

  • Heating appliances (such as a furnace)
  • Fireplaces/wood and pellet stoves
  • Fuel-powered vehicles
  • Cooking and household appliances (gas stove, gas dryer)
  • Camping stoves and barbecues
  • Fuel-powered generators
  • Fuel-powered equipment (lawnmower, snowblower)
  • Cigarettes

Carbon monoxide has:

  • NO smell
  • NO taste
  • NO colour

CO poisoning can cause:

  • Mild Effects
    • Tiredness
    • Headaches
    • Shortness of breath
  • Severe effects
    • Loss of consciousness
    • Coma
    • Death

To prevent CO poisoning:

  1. Install a certified CO alarm near bedrooms
  2. Clean your chimney
  3. Maintain stoves/fireplaces and have your furnace checked annually
  4. Never idle vehicles or run fuel-powered equipment in the garage

During a power outage

  1. Never use a fuel-powered generator indoors or in your garage or shed. Operate it at least 6 meters (20 feet) from any home or building
  2. Never use a barbecue, camping stove or fuel-burning equipment in your home, garage or shed

If your CO alarm sounds

  • Leave the building immediately
  • Call 9-1-1
  • Do not re-enter

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