Heat energy is to utilize the solar energy simplest and effectivest method to transform the solar energy. If step the heat that the sufficient solar energy produces of summer in quarter to store, for the heating in winter , will produce the enormous economic benefits and environmental benefit.
　　What our company developed utilizes soil to store hot technology, has solved the problem that heat is lost well, high-efficient, the operating cost is supported, save the space, it is reliable to use, once it can reach decades to build up service life.