In the hot semi-arid climate of Dezful, controlling solar radiation is essential for improving thermal and visual comfort. The aim of this study is to optimize the performance of brick lattice screens inspired by the vernacular architecture of Dezful in order to enhance visual comfort and reduce the solar radiation load in contemporary buildings. The research method is mixed and based on comparative analysis and quantitative simulation. In this process, twelve samples of brick lattice screens from historic houses in Dezful were identified and redesigned. Four test rooms with dimensions of 120 × 130 × 130 cm were modeled, and the lattice patterns were placed at specified distances from their glass façade. The modeling and simulation process was carried out using AutoCAD, Rhino, and the Grasshopper, Ladybug, and Honeybee plugins. Daylight indices, including DLA and UDI in three ranges, as well as surface radiation, were examined and analyzed for lattice screen distances of 10 to 40 cm from the glass façade.



The results showed that the Chlipa-pattern lattice, with a solid-to-void ratio of 67.3%, achieved the best performance among the studied samples, with an average DLA of 29.87% and UDI-100–2000 lux of 39.02%. Furthermore, the 10 cm distance from the glass façade recorded the highest DLA value, at 23.99%, while the 40 cm distance showed the weakest performance, at 16.86%. On the other hand, the square pattern, with a solid-to-void ratio of 97.7%, recorded the highest level of insufficient daylight, or Underlit, at 89.06%, and the lowest surface radiation, with an average value of 58.05 kWh/m². Overall, the Chlipa-pattern lattice at a distance of 20 cm, with a DLA value of 31.44%, provided an appropriate balance between visual comfort and the reduction of solar radiation load.