Boiler water circulating pumps

Another application of water pumps is in the heating industry. Boiler water circulating pumps are used to take the water that has been heated in a boiler and distribute that heated water through a network of pipes and heat exchangers (typically radiators or convectors). The thermal energy of the heated water is then passed by conduction to the radiator or convector, where convection currents then heat the air in the room. The circulating pump is usually electrically powered and controlled by a relay circuit that is closed when there is a call for heat, and open when the room temperature has passed the set point.