The resulting harmful gases include carbon monoxide, nitrogen dioxide, sulfur dioxide, particulates and excess water vapor.
Nitrogen dioxide can damage the respiratory tract.
Sulfur dioxide can irritate the eyes, nose and respiratory tract. Smoke and other particulates irritate the eyes, nose and throat and can cause lung cancer. Too much water vapor can lead to moisture problems in the home, including the growth of mold. Combustion pollutants enter the home from a variety of sources. Tobacco smoking inside the home also contributes.