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Party 'wear coat' correspondent research found that, at present the country has unveiled a complete transformation of the existing building energy policy, but overall progress is still slow, uneven regional development and presentation of the situation. Change both Hebei, Jilin and other northern areas of heating has become the size, basic to complete the 'second five' established goals; Guizhou, Anhui and other hot summer and cold winter area substantially change both still in the pilot phase, piecemeal, not a scale, part transformation areas are still stuck in the 'file' stage. Department of Housing statistics show that as of the end of October 2014, the northern heating area in the 'five' period totaled existing residential building heating metering and energy-saving area of ​â€\x8B750 million square meters, exceeding the State Department fully clear 400 million square meters the task of transformation. 2014 issued the task of transformation program 175 million square meters, has completed 99%. Reporters in Guizhou, Anhui, Shenzhen and other places learned that the current energy-saving renovation of existing buildings mainly stay in the pilot phase of the transformation of a small number of large public buildings, and in many places is mainly used in the external walls and the insulation membrane coating so simple the 'wear coat' approach. New innovative director of Guizhou province wall materials and building energy efficiency center Zangchao Li believes, resulting in 'a strong north weak south' situation is mainly due to residents of different climatic characteristics lead to different levels of demand for energy saving. In the northern cold regions, the heating system is an urgent need for residents' daily heating; in the south, energy-saving renovation of existing buildings mainly through the envelope to improve the insulation performance, reduce air conditioning power consumption caused by the use of the residents. 'In the conditions of hot summer and cold winter area, 'summer air conditioning, winter electric heaters' are common, although many use electricity, but the effect has been achieved using a simple' Zangchao Li said: 'No need, no power, even if the Government has sufficient subsidies, because many people are reluctant to 'non-essential' the transformation of energy-consuming, affecting normal life. 'Shenzhen Institute of building Research at the national level registered architect Han Yu believes that the existing district heating as compared to the North, South residential building energy efficiency have too externalities. 'Retrofitting of existing buildings to live the economic and living comfort of their own difficult to quantify, and long payback period