Originally Posted by popatim
Although it is best to err on the side of safety I do wish to point out that a properly adjusted natural gas system produces no carbon monixide; just c02 & moisture.
incendiary fuels produce carbon dioxide. If enough CO2 is present in the living environment, it can displace enough oxygen that asphyxiation can occur, meaning that it doesn't have to be poisonous CO (carbon monoxide), it can just smother a person to death. However...
Natural Gas heating systems are the leading cause of carbon monoxide deaths in the United States, according to the U.*. Consumer Product Safety Commission. When a natural gas heating system malfunctions, it produces odorless carbon monoxide. With no fumes or smoke to give warning, poisoning victims are easily asphyxiated by the carbon monoxide. Detectors are available that warn of carbon monoxide and/or explosive gas (methane, propane, etc.)