What are pumps used for in heating systems?

Pumps are critical components in heating systems that specifically function to circulate heated water throughout the system. In various heating applications, such as hydronic heating systems, pumps move warm water from the boiler to radiators, baseboards, or underfloor tubing, enabling even distribution of heat throughout the space being warmed. This circulation ensures that the heating system operates efficiently and maintains the desired temperature in the living areas.

When discussing the other choices, circulating air is typically managed by fans in forced air systems, while pressure regulation is controlled by pressure relief valves and not pumps. Controlling humidity involves dehumidifiers or humidifiers, which do not rely on pumps in the same way heating systems rely on water circulation. Therefore, the primary role of pumps in heating systems is to facilitate the movement of heated water, making the option concerning heating water the correct one.