What is the primary function of a centrifugal pump in a hot water heating system?

In a hot water heating system, the primary function of a centrifugal pump is to circulate water efficiently throughout the system. This circulation is essential for maintaining consistent and even heating in the radiators or heating coils, ensuring that all areas of a space receive adequate warmth.

Centrifugal pumps work by using a rotating impeller to impart kinetic energy to the water, which then moves through the piping system under pressure. This action allows for continuous movement of hot water from the boiler to various heating elements and back, creating an effective heating loop.

The other functions suggested, such as heating the water, filtering air, or cooling the water, are not the main purposes of a centrifugal pump. The heating of water is typically performed by a boiler or a heater, while filtering air is not a function associated with pumping systems. Cooling water might be relevant in certain specific contexts but is not applicable to the primary role of the pump in a hot water heating system.