Heat pumps work in a similar way to your kitchen fridge. The inside of your fridge is kept at a low temperature, but the coils on the back of your fridge are kept warm. Heat pump’s refrigerant system works in the same way. They operate by sucking in ambient air through the back of the unit to heat up refrigerant which is then compressed to increase its temperature, and fed across a heat exchanger filled with the water used to heat your radiators, UFH, and hot water cylinder coil.
