Heat pump systems are increasingly becoming the sharpest tool in the decarbonisation toolbox. As more and more heat pump systems are installed to help sustainably provide hot water, heating and cooling, systems are being optimised to provide even further efficiencies. Heat pump systems can be divided into two types, 2-pipe and 4-pipe configurations. In this downloadable guide, we explain the differences between the two, the differences between 4-pipe sub-systems and how to choose systems.
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