building integrated photovoltaic/thermal (BIPV/T) system has been considered as an attractive technology for building integration and has the potential to become a major source of renewable energy in the urban environment [1]. BIPV/T system produces thermal and electrical energy, which has higher overall output than that of two separated PV and solar thermal systems and potentially reduces the effective system costs in comparison with the stand-alone PV system [2]. Besides, the merit of a PV/T system lies in the reduction of the demands on physical space and the equipment cost through the use of common frames and brackets [3].