Features and shading Analysis of Qajar houses's iwans in Yazd

An Iwan is the most prominent architectural element of Yazd houses. Qajar houses in Yazd city have the most examples of Qajar houses with south iwan compared to other cities of Iran located in hot and dry climate. The purpose of this study is to investigate the different characteristics of the iwan and to express how it is shaded in Qajar houses in Yazd. The research seeks to answer the following questions: What are the characteristics of Iwans in the architecture of residential buildings in Yazd during the Qajar period? - What factors influenced the iwans in the architecture of residential buildings in Yazd during the Qajar period? - What is the climatic plan (shading) of the porch in the architecture of residential buildings in Yazd in the Qajar period? One of the climatic solutions to achieve thermal comfort in hot and dry climatic cities such as Yazd was to use shade and reduce the effects of sunlight. Due to the climatic conditions and the formation of the historic city of Yazd, the iwan element was used to create shade and thermal comfort. As a result, the iwans in the Qajar houses of Yazd were located in the southwest, southeast and south, respectively. Meanwhile, the location of the iwan on the south side has the highest efficiency and the most shading in the summer revolution, and it seems that other reasons have been effective in the formation of houses in Yazd, which have taken precedence over shading.