What is the primary function of a boiler?

The primary function of a boiler is to generate steam or hot water. Boilers are essential components in various heating systems, and they achieve this by using fuel to heat water to its boiling point, creating steam or producing hot water that is then circulated through a system for heating purposes. Steam generated by the boiler can be used for various applications, including heating buildings, powering turbines for electricity generation, and driving various industrial processes.

This function is crucial in both commercial and residential settings, where efficient heating is necessary for comfort and operational processes. Other options mention functions that pertain to heating systems, such as distributing heat and filtering air, but they do not encompass the primary role of the boiler itself, which is centered on steam and hot water generation. Cooling liquids does not align with the boiler's purpose, as boilers are not designed for cooling operations.