Carbon monoxide (CO) is a colorless, odorless and tasteless gas. It’s created by partial fuel combustion frequently caused by not enough oxygen. In your home, appliances that need natural gas, charcoal, wood or kerosene are vulnerable. Especially if they are not running correctly or have been installed wrong.
Vehicle exhaust fumes from attached garages, as well as malfunctioning fireplaces can also produce carbon monoxide. CO is poisonous to the body and is lethal at increased levels or with prolonged exposure.