During the expansion and contraction of the heat exchanger during the heating process, sections can open up at the seams or split open at a weak spot and could allow dispersal of the combustion gases into the air stream going to your living space. Please refer to the next two questions for more information on carbon monoxide. A. Carbon monoxide is produced during incomplete combustion of fuels such as natural gas, LP, wood, oil, etc. As we make our homes more air tight, we reduce the required air supply to the fuel burning appliances, thus causing incomplete combustion. Improperly sized flues that do not vent properly.
Carbon monoxide limits the ability of the blood to carry oxygen to our organs and tissues.
Low level CO poisoning mimics flu and cold symptoms such as fatigue, headaches and nausea. These symptoms normally become less severe upon leaving the contaminated area. Higher levels can lead to dizziness and confusion and eventually to unconsciousness or death. Due to the seriousness of Carbon monoxide, it is highly recommended that every home have its fuel-burning appliances checked and cleaned every year regardless of age. It is also wise to install a UL approved CO detector on every level of the dwelling to help ensure the health and safety of the occupants.