In China, the portion of building energy consumption within the total energy consumption has already reached around 28% and is still climbing as our economic conditions getting better. The building energy consumption level in China nowadays is 2 to 4 times larger than that in developed nations. As the big part of building energy consumption, the central air-conditioning occupies about 40% of them.

GSHP air-conditioning system as a mature green technology , with its outstanding energy saving efficiency, has long been recognized and used in developed countries such as Switzerland; Denmark; Sweden etc,. While in China, the application of such technology is just burgeoning. Currently, in 3.3 billion square meters pool of inventory buildings, only a small percentage has implemented some kind of energy saving technology. As the big part of building energy consumption, the energy saving central GSHP air-conditioning system technology has tremendous market potentials.