A Water Source Heat Pump (WSHP) is like the heat pump in your fridge. It is designed to extract heat from one place (inside the fridge) and move it elsewhere (usually out the back of the unit).  A heat pump, whether air or water, uses the principle of moving heat from one place to another, where the heat is concentrated and turned into useable heating which is transferred via insulated pipes around the network.

Whilst this process uses some electricity, the amount used is far less than using electricity as a direct source of heating. Consequently, as a heat pump uses energy that is already present in the environment (water, heated by the sun and earth in this case), the system itself does not burn any fuel and therefore emits no carbon dioxide.