Carbon monoxide (CO) is a clear, odorless and tasteless gas. It’s created by incomplete 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 working correctly or have been installed improperly.
Vehicle exhaust fumes from nearby garages, as well as fireplaces that aren’t working right may also be a carbon monoxide source. CO is dangerous to the body and is lethal at heightened levels or with extended exposure.