Some issues in building energy efficiency in China

Referring to the German building energy efficiency laws and energy labelling, analyses the current Chinese standard for building energy efficiency and its content. Puts forward some ideas to perfect and improve the standard. Building energy efficiency should be analysed in view of the whole year period in order to get a complete and correct conclusion. The assessment and statistics of building energy consumption should be performed in a comprehensive and normative mode i.e. in addition to the building heating and cooling energy consumption, the electricity consumption, the energy consumption for domestic hot water supply and the system efficiency of buildings should also be assessed. Besides establishing basic mandatory standard for building energy efficiency, it is needed to lay down standards for medium to high classes with different levels of building energy efficiency in China. Such links as air tightness, thermal bridge, natural ventilation and heat recovery should be strengthened for the energy efficiency improvement in current buildings.