The system could be mounted on the southern roof of the villa,on the courtyard lawn, or the southern slope of the construction. The hot water could be delivered to any floor without limitation. The system has adopted the forced circulation (automatic control) work module to control the temperature automatically and deliver water by pressurization. So it has solved the long time inconveniences of manual operation. The system only needs small amount of investment, and it's easy to handle. Moreover, it's safe, convenient and energy saving, causing no pollution to the environment, so it's complemented as Green Project by the experts.