Carbon monoxide (CO) is a byproduct of the incomplete burning of common fuels, including the natural gas, propane, oil, coal and wood used in everyday home appliances and HVAC equipment. Exposure to carbon monoxide can cause serious health impacts, including death. Because CO is tasteless, odorless and colorless, your home should have at least one CO monitor – and preferably more – to keep you and your family safe from carbon monoxide poisoning.