Carbon monoxide (CO) is an invisible, odorless and tasteless gas. It’s created by partial fuel combustion often caused by insufficient oxygen. In your house, appliances that need natural gas, charcoal, wood or kerosene are vulnerable. Especially if they are not operating correctly or have been installed wrong.
Vehicle exhaust fumes from neighboring garages, as well as malfunctioning fireplaces could also produce carbon monoxide. CO is toxic to the body and is deadly at increased levels or with extended exposure.