What is the primary function of a combustion air fan in a boiler?

The primary function of a combustion air fan in a boiler is to supply the necessary air for combustion in the burner. In order for a boiler to operate efficiently and safely, it requires a specific amount of air to mix with the fuel for the combustion process. The combustion air fan ensures that this air is adequately supplied and maintained at the appropriate pressure and volume, enabling the burner to function properly and maximizing the efficiency of the combustion process. This is crucial for achieving the desired energy output and minimizing emissions.

Other functions, such as cooling boiler components, circulating steam, or exhausting flue gases, are important in the overall operation of a boiler but do not pertain to the primary role of the combustion air fan. These functions are handled by other systems and components within the boiler's infrastructure.