this paper is about Energy efficiency for residential buildings in hot regions in the North of China.Assume power without effective. the result of the heat during the winter, causing pollution to the environment. the Government has planned to develop 5-year period, or '' Energy Efficiency Retrofit for Existing Residential Buildings '‘ (EERFERB) will help reduce power consumption, heat, improve energy efficiency, to improve the quality of the environment. In addition, the promotion of energy efficiency in homes, buildings, so that effective and reduces CO2 and atmospheric pollution by EERFERB