A modern heating system using an air-to-water heat pump is indeed very efficient. But brine-to-water and water-to-water heat pumps are even more efficient and therefore consume even less electricity. Furthermore, the energy yield of air-to-water heat pumps at low outside temperatures is not quite as good as at higher temperatures.
Two further points that you should know about: air-to-water heat pumps may be cheaper to buy than other types of heat pump, but they are still more expensive than oil or gas boilers.
And air source heat pumps require large volumes of air. Consider the installation site during the planning phase as well as the noise generated by the fans as they take in air. It is best to select a super quiet model.
If you have any questions on air to water high temp heat pump, Mini Heat Pump. We will give the professional answers to your questions.