A heat pump is an energy efficient water heating solution for your home, much like solar energy.
A heat pump works through utilizing the ambient air temperature (thermal energy) and converting this to usable energy to create hot water. A heat pump essentially works in a similar way to a refrigerator, only in reverse. The only primary energy used in this process is to run the compressor and fan.
A heat pump is generally used as a centralized water heating solution supplying all draw-off points of water.