With winter coming on to cool much of North America, it’s worthwhile to address a potential hazard that arises with increased use of fuel-burning appliances such as furnaces and water heaters: carbon monoxide. Carbon monoxide (CO) is an odorless, colorless gas produced by the combustion of fuels such as natural gas, oil, and With winter coming on to cool much of North America, it’s worthwhile to address a potential hazard that arises with increased use of fuel-burning appliances such as furnaces and water heaters: carbon monoxide. Carbon monoxide (CO) is an odorless, colorless gas produced by the combustion of fuels such as natural gas, oil, and With winter coming on to cool much of North America, it’s worthwhile to address a potential hazard that arises with increased use of fuel-burning appliances such as furnaces and water heaters: carbon monoxide. Carbon monoxide (CO) is an odorless, colorless gas produced by the combustion of fuels such as natural gas, oil, and With winter coming on to cool much of North America, it’s worthwhile to address a potential hazard that arises with increased use of fuel-burning appliances such as furnaces and water heaters: carbon monoxide. Carbon monoxide (CO) is an odorless, colorless gas produced by the combustion of fuels such as natural gas, oil, and With winter coming on to cool much of North America, it’s worthwhile to address a potential hazard that arises with increased use of fuel-burning appliances such as furnaces and water heaters: carbon monoxide. Carbon monoxide (CO) is an odorless, colorless gas produced by the combustion of fuels such as natural gas, oil, and