Recently, Jakarta has implemented a new standard for new building construction to reduce the energy consumption of office buildings. This has to meet the minimum overall thermal transfer value (OTTV) of 35 watt/m². In tropical countries, the most effective passive design strategy method is the use of shading devices. Dense shading will more effectively reduce energy consumption but will reduce visibility through the opening. Sudare is a traditional Japanese blind made from bamboo.Its original function was to prevent direct solar radiation and introduce natural ventilation. The characteristic Sudare form makes it possible to see through to objects outside the house. The aim of this research is to identify an alternate mode of façade configuration using external horizontal blinds based on the Sudare form to meet the minimum standard of Indonesian National Standard (SNI), with greater efficiency in terms of thermal energy use to minimize energy consumption and maintain visual comfort. Ladybug and Honeybee inside the Grasshopper plugin of Rhinoceros 3D with the Energy plus engine will be used to simulate a standard building as baseline performance, and buildings that use different Sudare dimensions and spacers as shading devices parametrically. Based on this study, the optimum form of Sudare blind, with a diameter of 10.01 mm and 5 mm spacers, has achieved a 5% reduction in OTTV and a 6% reduction in thermal energy use, as compared to the baseline building. It also gives better uniformity of daylight distribution, which improves visual performance and comfort.

Energy consumption is a major sustainability issue. One of the largest portions of energy consumption in buildings comes from cooling. This paper proposes the use of L-shaped minilouvers as shading, which both improve useful daylight illuminance (UDI) and reduce cooling-energy consumption. Jakarta, Indonesia was chosen as the study location since it has driving factors for higher cooling energy, ranging from those of demographic to the environment. An open office was chosen for simulation in Rhinoceros 3D with the Grasshopper, LadyBug, and Honeybee plug-ins, which utilize the EnergyPlus engine. Following the UDI and cooling-energy simulations, surveys were conducted to gather the information of the price of materials for shading and electricity. Savings from cooling energy were compared with the cost of shading application to obtain the simple payback periods. The best shading was provided by L-shaped minilouvers, which can achieve a simple payback period of 0.86 years, reducing cooling-energy consumption by around 18% while improving around 16.78 UDI in comparison with the base case with the average of all the orientations. All simulated L-shaped minilouvers also performed better than the overhang did, which is a more common form of shading in the simulated location.

The annual growth of energy consumption in both residential and public buildings has been established globally as been significantly increasing. Therefore, the proposed active and passive building designs are intended to provide convenience and greatly reduce the high energy requirements, before considering mechanical systems (associated with fossil fuel-based energy consumption). This encourages the development of a new design, such as the Climate Adaptive Building Shell (CABS). This study aims to assess the effectiveness of CABS with Helicone mechanisms on energy and natural lighting, as well as its influential factors. The parametric modeling simulation method was applied to compare the energy and natural lighting aspects, between the adaptive and static facades of the Helicone mechanism. The results indicated that the adaptive facade was more effective than the static, based on energy and natural lighting. It was also found that the 30° adaptive configuration with the Helicone mechanism was the most effective. These results were influenced by several factors, i.e., the small turning angle (30° and 150° (-30°) and the anticlockwise direction of the adaptive facade rotation.