How does a heat pump work?

Heat pumps absorb warmth from sources of heat including the air, ground and bodies of water. They do this by transferring the heat to a liquid (called a ‘refrigerant’), which circulates through a looped system of pipes. As it heats up it becomes a gas and the Heat pump systems then use a compressor which heats this gas up by increasing its pressure.

The hot gas then transfers its heat to the water in your system through a heat exchanger, it’s then able to provide the heating we need in our homes, for our radiators, hot water and other domestic heating like underfloor heating.

Different types of heat pump work in slightly different ways, as we will explain below. Alternatively, please click to discover How it Works.

This image shows the basic components of a heat pump and how the refrigerant moves within the system
How heat pumps work