Civil Engineering and Architecture 13(4): 3299-3309, 2025 http://www.hrpub.org DOI: 10.13189/cea.2025.130432 Integration of Glazing, Sun Shading, and Photovoltaic Technologies for Advancing Nearly Zero Energy Building Cut Abrari Fi Illiyina Jannah, Ova Candra Dewi * , Miktha Farid Alkadri, Nisrina Dewi Salsabila Department of Architecture, Faculty of Engineering, Universitas Indonesia, Indonesia Received March 20, 2025; Revised June 13, 2025; Accepted July 23, 2025 Cite This Paper in the Following Citation Styles (a): [1] Cut Abrari Fi Illiyina Jannah, Ova Candra Dewi, Miktha Farid Alkadri, Nisrina Dewi Salsabila , "Integration of Glazing, Sun Shading, and Photovoltaic Technologies for Advancing Nearly Zero Energy Building," Civil Engineering and Architecture, Vol. 13, No. 4, pp. 3299 - 3309, 2025. DOI: 10.13189/cea.2025.130432. (b): Cut Abrari Fi Illiyina Jannah, Ova Candra Dewi, Miktha Farid Alkadri, Nisrina Dewi Salsabila (2025). Integration of Glazing, Sun Shading, and Photovoltaic Technologies for Advancing Nearly Zero Energy Building. Civil Engineering and Architecture, 13(4), 3299 - 3309. DOI: 10.13189/cea.2025.130432. Copyright©2025 by authors, all rights reserved. Authors agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 International License Abstract Indonesia’s Roadmap for Buildings and Construction targets implementing the Net Zero Energy Building (NZEB) for all existing buildings and a renewable energy mix of 31% by 2050. This study explores implementing passive and high-grade systems in the Pusgiwa Building at Universitas Indonesia, built in 2017, to achieve a Nearly Zero Energy Building by optimizing solar radiation potential. The passive strategies include the use of single tinted glass, single low-E glass, double-layer low-E glass, and configurations of horizontal, vertical, egg-crate external shading, all evaluated for Overall Thermal Transfer Value (OTTV) and simulated for Energy Use Intensity (EUI) using Grasshopper. HelioScope software was used to explore rooftop photovoltaic (PV) panels in this building. The study shows the combination of double-layer low-E glass—visible light transmittance of 39%, U-value of 1.6 W/m 2 K, solar heat gain coefficient of 0.25—and the egg-crate sun shading on south and north facades—overhang depth of 75 cm and height of 215 cm—achieved 20.15% energy saving. Rooftop monocrystalline PV panels with a 10° tilt angle facing north contributed 24.5% of the total energy. This study highlights the potential energy savings through a selection of glazing and external shading combined with renewable energy, which can support the advancement of NZEB targets. Keywords Nearly Zero Energy Building (NZEB), Sun Shades, Window Glazing, Overall Thermal Transfer Value (OTTV), Photovoltaic (PV) 1. Introduction Indonesia, located near the equator, possesses significant solar energy potential because of its location, ensuring consistent and substantial solar radiation throughout the year. According to the World Bank and Solargis [1], Indonesia’s solar radiation potential ranges from 3.6 to 6 kWh/m²per day, providing a significant opportunity for harnessing solar energy. However, this solar radiation significantly influences the heat gain in buildings, affecting indoor thermal comfort. Considering that occupants spend approximately 80% of their time indoors, the energy demand for maintaining a comfortable indoor environment increases [2]. Buildings consume 36% of the energy produced and account for 39% of global carbon emissions, making them one of the most significant contributors to climate change [3]. In Indonesia, heating, cooling, lighting, and appliances account for 33.5% of the total energy consumption in buildings, compared to the energy use in transport, industry, and public services [4]. This high energy demand in buildings leads to concerns about its impact on energy availability, especially for non-renewable resources [5]. Furthermore, 87.70% of Indonesia’s energy sources come