The teaching building is located in the hot summer and cold winter region in China. After built, due to use of row window and poorly considering the indoor comfort, it is very hot in summer. This study measured temperature, pressure of the teaching building and took the measurements as initial boundary conditions, used CFD software to simulate the indoor air environment, thermal environment, the indoor thermal comfort index (PMV- PPD) of this teaching building. Through the simulation, this study finds the indoor environment of the teaching bu...