引言目前,我国既有建筑超过了400亿平方米,其中95%以上为高能耗建筑,加之每年以20亿平方米速度增长的新建建筑,已使建筑业成为和工业、交通并列的能耗大户。2011年1月,财政部、住房和城乡建设部联合下发了《关于进一步深入开展北方采暖地区既有居住建筑供 Introduction At present, China’s existing buildings exceed 40 billion square meters, of which more than 95% are high-energy-consuming buildings, and the newly-increased buildings with an annual growth rate of 2 billion square meters have made the construction industry a major energy consumer in parallel with industry and transportation. . In January 2011, the Ministry of Finance, the Ministry of Housing and Urban-Rural Development jointly issued the “About the further development of existing residential buildings in northern heating areas.