What is a common product of combustion in structure fires?

In structure fires, the combustion of materials, especially organic substances such as wood, textiles, plastics, and other common building materials, leads to the production of various gases. Carbon monoxide is a predominant byproduct of incomplete combustion, which occurs when there is insufficient oxygen to fully convert carbon-containing materials into carbon dioxide.

Due to its colorless and odorless nature, carbon monoxide is particularly hazardous, as it can accumulate rapidly and pose severe health risks to individuals exposed to it in an enclosed space. It interferes with the body's ability to transport oxygen, which can lead to symptoms such as headaches, dizziness, confusion, and even death at high concentrations.

In contrast, ozone is not typically produced in significant quantities during structure fires; it usually forms as a result of photochemical reactions in the atmosphere. Sulfur dioxide can be released if sulfur-containing materials are burned, but this is not a common product in most structure fires. Aldehydes can also be produced during combustion, but carbon monoxide is far more prevalent and concerning in these scenarios. Hence, carbon monoxide stands out as the most common and critical product of combustion in structure fires.