What may cause CO levels to increase?
  • Fuel-burning appliances and other equipment that are not functioning properly or are not adequately vented may cause a build up of CO.
  • Air-tight, energy-efficient homes meant to keep warm air in during winter months and cool air in during summer months may also trap CO inside.
  • Cracked furnace heat exchanger
  • Blocked vents and chimneys
  • Disconnected or corroded vents
  • An inadequate air supply for fuel-burning appliances can cause down-drafting which may force CO contaminated air back into the home.

Show All Answers

1. What are sources of CO?
2. What may cause CO levels to increase?
3. What are the signs of CO poisoning and build up?
4. What are signs that a fuel-burning appliance is not receiving enough fresh air for combustion?
5. How do you prevent CO build up?
6. Why should I buy a CO detector?
7. What features should I look for when I select a CO detector?
8. What should you do if your CO detector sounds?