We bought a new home nearly five years ago, which came complete with a new air source heat pump, so it was already installed. We live within a small development where all our neighbours have similar systems.
The system heats our domestic water and powers an underfloor heating circuit downstairs and a separate circuit running convector radiators upstairs. The pump is located at the side of the house and is around seven years old now. It is quite a large unit compared with heat pumps available now, as the technology is moving on so fast.