Detect and Prevent Carbon Monoxide

Safety & Reliability

Detect and Prevent Carbon Monoxide

If you think carbon monoxide may be present, leave the area immediately and call

1‑866‑222‑2068

Understanding the Risk

Carbon monoxide is tasteless, colourless, and odourless and is produced by the incomplete combustion of a hydrocarbon such as natural gas, wood, propane, or gasoline. Because you cannot see, taste, or smell it, CO can build up indoors without warning.

Know the Warning Signs

The effects of carbon monoxide vary depending on the concentration and length of exposure.

Low Concentration

Low Concentration

Small Health Impacts

  • Slight headache
  • Shortness of breath during moderate physical activity
  • Flu-like symptoms
  • Weakness
Higher Concentration

Higher Concentration

More serious health impacts

  • Severe headache
  • Dizziness, nausea, vomiting
  • Mental confusion, weakness
  • Vision and hearing impairment
  • Collapse or fainting during exertion
  • Loss of muscle control
  • Drowsiness
Extreme Concentration

Extreme Concentration

Life‑threatening effects

  • Unconsciousness
  • Brain damage
  • Death

Protect Your Home with CO Alarms

Installing a carbon monoxide alarm is the best way to protect you and your family. CO alarms can detect the gas early, before symptoms appear, and give you time to act.

Tips for CO Alarms:
  • Install at least one alarm on every level of your home.
  • Place alarms outside bedrooms so they wake sleeping occupants.
  • Test alarms monthly to make sure they’re working.
  • Replace batteries regularly, or choose long‑life sealed units.
  • Replace alarms according to manufacturer’s instructions (usually every 7–10 years).

How to Reduce the Risk

Reduce the chance of carbon monoxide in your home by keeping appliances in good condition and ensuring proper ventilation.

  • Keep your fireplace flue and chimney clear.
  • Service your furnace, water heater, and fuel‑burning appliances every year.
  • Never run vehicles or equipment (like generators or snowblowers) in a garage or enclosed space.
  • Never use barbecues indoors.
  • Limit use of exhaust fans and attic vents that pull air out of your home.
  • Never use a gas range or space heater as a main source to heat your home.

If You Suspect Carbon Monoxide

If you think carbon monoxide is present:

  • Leave your home immediately for somewhere with fresh air.
  • Call 911 if medical attention is needed.
  • Call 1‑866‑222‑2068 from a safe location.
  • Do not re‑enter until it is confirmed safe.