What is one indication of good combustion in a boiler?

Low carbon monoxide levels are a strong indication of good combustion in a boiler. During the combustion process, fuel should ideally be converted primarily into carbon dioxide and water. If there are high levels of carbon monoxide, it suggests that the combustion is not complete and that the fuel is not being burned efficiently. This incomplete combustion leads to wasted fuel and can produce harmful emissions.

Good combustion should ideally result in minimal production of carbon monoxide, as this indicates that the fuel is being thoroughly utilized for energy production rather than being released as a byproduct. Therefore, maintaining low carbon monoxide levels is crucial for not only efficiency but also for safety and environmental considerations. Other factors in assessing good combustion might include the composition of the emissions, but low carbon monoxide is a critical indicator.