The importance of iterative process in facade design optimization for a green office building in South Tangerang City

Currently, climate change and wellbeing provoke buildings to have higher sustainable performance. So, the condition expects that buildings can tackle those issues that benefit and less impact the environment and its occupants. This particular target needs integrated design approach that the role of the iterative process is necessary. The study focuses on the process of facade design for the buildings that are targeted to have sustainable performance. So, the design of the building facades shall be in accordance with the green building standard issued by GBC Indonesia, Greenship NB Version 1.2. The optimization of facade design was conducted based on three parameters: OTTV, daylight, and outside view. The minimum requirements for each parameter are 35 Watts/sqm for maximum OTTV, 30% for a minimum active area covered by daylight, and 75% for a minimum active area with an outside view. One of the aims of this study is to give a depiction of how to conduct a design process by using an iterative way. In addition, it is to identify the critical keys in enabling the building to the requirements.

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