What is a common sign of inadequate air flow in a boiler?

High fuel consumption is a common sign of inadequate airflow in a boiler. When there is insufficient air entering the combustion chamber, the combustion process becomes inefficient. This inefficiency leads to incomplete combustion of the fuel, which means that more fuel must be burned to produce the same amount of energy. As a result, the boiler consumes more fuel than it should, leading to increased operational costs and reduced efficiency.

Inadequate airflow can also result in other issues, such as increased levels of unburned fuel and higher emissions, but the most immediate and noticeable effect is the higher fuel consumption. Observing this condition serves as a practical indicator that airflow needs to be addressed to restore efficiency and optimal performance of the boiler system.