01/28/2026
Carbon monoxide (CO) is an odorless, colorless gas that kills without warning.
Many household items including gas- and oil-burning furnaces, portable generators, and charcoal grills produce this poison gas.
The most common symptoms of CO poisoning are headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion. CO symptoms are often described as “flu-like.”
If you breathe in a lot of CO, it can make you pass out or kill you. People who are sleeping, drunk, or under the influence of other substances can die from CO poisoning before they have symptoms.
CO is found in fumes produced any time you burn fuel in cars or trucks, small engines, stoves, lanterns, grills, fireplaces, gas ranges, or furnaces.
CO can build up indoors and poison people and animals who breathe it. However, you can reduce your risk of CO poisoning with a few small steps.
Some tips:
Install battery-operated or battery back-up CO detectors near every sleeping area in your home.
Consider buying a detector with a digital readout. This type of detector can tell you the highest level of CO concentration in your home, in addition to sounding an alarm.
Have your heating system, water heater, and any other gas, oil, or coal burning appliances serviced by a qualified technician every year.
Make sure your gas appliances are vented properly. Horizontal vent pipes for appliances, such as a water heater, should go up slightly as they go toward outdoors. This prevents CO from leaking if the joints or pipes aren't fitted tightly.
Never heat your house with a gas oven. Don't cook or burn anything on a stove or fireplace that isn't vented.
Never burn charcoal indoors. Burning charcoal - red, gray, black, or white - gives off CO.
Never use a portable gas camp stove indoors. Do not use portable flameless chemical heaters indoors.
Never use a generator inside your home or garage, even if doors and windows are open.
Only use generators outside, more than 20 feet away from any windows, doors, and vents.
When using a generator, use a battery-powered or battery backup CO detector in your home.
More detailed information can be found here: https://www.cdc.gov/carbon-monoxide/about/index.html