Air source heat pumps can be used for both heating and cooling, as well as domestic hot water and swimming pools. They can be connected to radiators, underfloor heating, or a wall-mounted controllable fan unit.
Air source heat pumps can be used for heating all year round between +35°C and -25°C - which makes them ideal for the UK - and because they use the outside air as a fuel source, you'll have an always available and inexhaustible source of heat.