Abstract：

Tests the operating conditions of the demonstration project. The results indicate that the room temperatures can be adjusted and the horizontal imbalance can be reduced obviously by adopting the onoff valve regulation technology in vertical onepipe series heating system, especially for the public buildings of which the heating costs need not to be shared individually, in which the room temperature can be set at low temperature point on holidays. In addition, the results also show that the watermixing technology makes the heating system operated with higher flow rate and lower temperature difference, reducing the vertical imbalance of the system. Thus, the energy saving effect is remarkable by using the two technologies especially for the poor balanced heating systems.