What is a common outcome of incomplete combustion in a boiler?

Incomplete combustion in a boiler often leads to the creation of carbon monoxide. When fuel, such as natural gas or oil, does not burn completely due to insufficient oxygen or inadequate mixing of fuel and air, it produces carbon monoxide, a toxic and dangerous gas. This is a significant safety concern in boiler operation, as carbon monoxide can lead to hazardous conditions for both equipment and personnel.

In contrast, lower energy output might also occur due to poor combustion efficiency, but the primary outcome of incomplete combustion is the production of carbon monoxide. Stable temperatures and increased efficiency are generally not associated with incomplete combustion; instead, incomplete combustion tends to create fluctuations in temperature and reduces overall efficiency. Thus, the production of carbon monoxide stands out as a key result of incomplete combustion in boiler systems.