High performance windows alongside with diverse shading strategies are developed rapidly in recent years.In this study,the impact of window and shading on indoor thermal environment under mixing ventilation was experimentally investigated.A typical office with ordinary heat sources and two thermal manikins was adopted.Four kinds of shading strategies are considered,namely no shading(NS),internal shading(IS),traditional mid-pane shading(TMS),and pipe-embedded mid-pane shading(PMS).The distributions of temperature and air velocity on different planes were measured.The draft rating(DR)and air diffusion performance index(ADPI)were evaluated.The results show that the thermal environment under NS was the worst.The temperature distribution was highly non-uniform.Smoke visualization revealed that the strong thermal plume from window pushed away the supply airflow.The maximum DR was 27.8%and ADPI was 81.3%.IS avoided the direct impact of solar radiation on indoor environment,and the thermal comfort was improved.TMS(e.g.double skin facade)blocked the solar radiation in the window cavity,but its temperature remained high because it cannot be cooled efficiently.Though solar heat gain was reduced,the thermal environment was dissatisfactory.With regard to PMS,the room temperature was quite homogeneous.The ADPI was 92.2%.The thermal comfort was significantly improved.