Iranian Sustainable Building Scientific Association International Journal of Urban Management and Energy Sustainability 2538-1628 7 01 2026 05 01 Investigation of the Physical Aspects of Openings on Interior Daylight Quality and Exterior Visibility 31 49 734840 10.22034/ijumes.2026.2085179.1354 EN Alireza Goodarzi Ardakani Department of Architecture and Urban Planning, Yas.,C., Islamic Azad University, Yasuj, Iran 0009-0006-9430-1788 Yaghowb Peyvastehgar Department of Architecture and Urban Planning, Yas.,C., Islamic Azad University, Yasuj, Iran 0009-0006-9430-1788 Aliakbar Heidari Department of Architecture, Faculty of Technical and Engineering, Yasouj University, Yasouj ,Iran 0000-0002-9077-2308 Ali Mehboodi Department of Architecture and Urban Planning, Yas.,C., Islamic Azad University, Yasuj, Iran 0000-0002-7261-9051 Journal Article 2026 01 02 Daylight and visual connection to the exterior are critical factors in architectural design, directly influencing occupants’ comfort, well-being, and energy performance. However, contemporary window design often lacks a systematic understanding of how opening geometry simultaneously affects daylight quality and exterior visibility. This study aims to investigate the combined impact of opening position and elongation on indoor daylight performance and view quality. The research asks how variations in window location and geometric elongation influence daylight metrics and the extent of visual access to the outside. A parametric simulation approach was employed using Honeybee and Ladybug, analyzing 22 scenarios of a reference room model (5×3×3 m) through daylight factor, horizontal illuminance, glare probability, and view analysis indices. The results show that centrally positioned openings with horizontal elongation improved daylight uniformity by approximately [10%] and increased exterior visibility by [36%] compared to vertically elongated configurations. Qualitatively, the findings suggest that balanced horizontal window proportions enhance both visual comfort and spatial perception without excessive glare. Future research should extend the model to multiple climatic contexts and diverse room geometries to improve the generalizability of the conclusions. Future research may extend this framework by incorporating different room proportions, façade orientations, glazing properties, shading devices, and diverse climatic contexts to enhance the robustness and applicability of the results. https://www.ijumes.com/article_734840_e1a7af13b41d6cfb257b8513800343db.pdf