Abstract: Abstract: China's energy production and consumption will have considerable impacts on both China and global environment in the future. During the 'Twelfth Five-Year Plan' period, the Chinese government issued a building energy conservation target that the primary energy consumption per unit of GDP should be decreased by 16% from 2011 to 2015. To achieve this goal, building energy efficiency is a key focus of the project. The Beijing government launched the total energy consumption control plan during the "Twelfth Five-Year Plan". Beijing introduced a technical specification (DB11/381-2006) for renovating existing residential buildings to improve their energy efficiencies in 2006. One year later, Beijing introduced and enforced the design standard for energy efficiency of residential buildings (DBJ11-602-2006). The objective of these standards was to reduce energy utilization in residential buildings. Swine farms in Beijing China have caused many environmental concerns including energy utilization and CO2 emissions. Reducing the fossil fuels must be a top priority so that Beijing swine production remain sustainable. Few new swine farms will be constructed and existing swine farms will be renovated according to the 'Twelfth Five-Year Plan of Animal Husbandry in Beijing". To discover, develop and evaluate energy efficient measures for existing swine houses in Beijing China, we conducted the following studies 1) investigating the insulation characteristics of the outer envelopes of existing swine houses, 2) evaluating the potential heating energy savings by renovating a typical existing swine house with 370-mm thick clay brick walls and clay tile roof by covering the wall exteriors with 70 mm thick extruded foam board and the roof with color steel laminboard containing 80 mm of mineral wool, 3) estimating the investment payback periods for the renovations, and 4) measuring the inside and outside temperatures of the renovated and control swine houses during the winter of 2012. The results showed that the insulation levels of the existing swine house in Beijing was poor compared with the technical specifications for renovating existing residential buildings to improve energy efficiency (DB11/381-2006). The walls of the existing house were either 240 mm or 370 mm thick clay bricks, the roof consisted of clay tiles, asbestos tiles or colored steel laminboard, and the window consisted of either single pane of glass or single film of plastic. Based on inside temperature setpoint of 20℃ and heating period of 125 days, the energy consumption per unit area of renovated and controlled swine houses were 22 and 72 kg/m2, respectively. Energy conservation renovations of this type of swine house could reduce energy by 69% with investment payback period of 7.4 years. Compared with the controlled swine house, the daily average temperature in the renovated house was 1-3℃ higher when the daily average outdoor temperature was 2.6-9.3℃. Temperature differences between renovated and controlled swine houses were higher at lower outdoor temperatures. The inside temperature of the renovated house was 3.6℃ higher than the controlled swine house at the coldest recorded outdoor temperature of -2.3℃.