xxxxxx E RNEST O RLANDO L AWRENCE B ERKELEY N ATIONAL L ABORATORY Building Performance Simulation Tianzhen Hong 1 , Hung-Wen Lin 1 , Wen-Kuei Chang 1 , Liping Wang 1 , William Turner 1 Da Yan 2 , Dandan Zhu 2 , Xin Zhou 2 , Chuang Wang 2 , Chen Peng 2 , Xiaoxin Ren 2 Environmental Energy Technologies Division, LBNL Department of Building Science and Technology, Tsinghua University, China June 2013 This report is a summary of research work conducted by LBNL and Tsinghua University, China in 2011 and 2012 under the 5-year research program of the U.S.-China Clean Energy Research Center for Building Energy Efficiency. The LBNL’s research was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Tsinghua’s research was supported by the Ministry of Housing and Urban-Rural Development and the Ministry of Science and Technology of China, under Contract No. 2010DFA72740-02. Some joint research work was also sponsored by Energy Foundation.