Any fuel-burning appliance that is malfunctioning or improperly installed can create carbon monoxide. 

  • Furnaces, gas range/stove, gas clothes dryer, water heater, portable fuel-burning space heaters, fireplaces, generators and wood burning stoves

  • Vehicles, generators and other combustion engines

  • Blocked chimney or flue

  • Cracked or loose furnace exchanger

  • Back drafting and changes in air pressure

  • Operating a grill in an enclosed space