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One of the goals of a building is to create a comfortable environment that does not affect the health and operations of its occupants, therefore a system needs to be created to ensure comfort in classrooms. To fulfill a comfortable situation, there is a standard that regulates comfort, especially thermal and visual comfort. Thermal comfort is regulated in SNI 03-6572-2001 and visual comfort is regulated in SNI 03-6575-2001. The aim of this research is to design a tool to automatically monitor temperature and lighting, determine greater accuracy, determine temperature and lighting comfort distances, and test Smart Comfort measurement results in accordance with the SNI-03-6571-2001 and SNI-03-6575-2001 conformity standards. This design uses ESP32 with IoT-based LDR and DHT11 sensors which can be seen on the web and application, determines the accuracy and range of Smart Comfort values for monitoring temperature and lighting and determines the suitability of measurement quantities in the SDN PINANG 3 classroom.

This experiment investigates the heat transfer characteristics of an ice bag gel phase change material (PCM) incorporated within bricks. The study seeks to investigate the performance of ice bag gel as PCM in improving thermal behavior of building material. The experiment consisted of subjecting brick samples with and without ice bag gel PCM to thermal cycles in a semi-automated laboratory setup. The results indicate that ice bag gel PCM incorporated in bricks exhibited minimal changes and better heat transfer as compared to the dry bricks. It was observed that the ice bag gel PCM registered lower peak temperature and slower rates of temperature drop which means their heat storage and release characteristics were efficient. Furthermore, the ice bag gel system produced a steady radiation flux, indicating that it was able to minimize the effects of temperature variations. These results imply that ice bag gel PCM has the potential to be a green and economical option for enhancing thermal comfort and decrease energy consumption in buildings.

This study formulates a design concept for the Beach Tourism Resort Area in Botubarani Village by applying tropical architecture that responds to coastal climatic conditions while enhancing the quality of visitor experiences. The research integrates principles of thermal comfort, environmental sustainability, and the ecological potential of coastal environments as the basis for creating climate-adaptive and environmentally responsive tourism areas. The methodology includes site analysis, field observation, climatological assessment, and a literature review related to tropical architecture and coastal tourism design. The collected data were used to determine building orientation, mass layout patterns, visitor capacity, materials, vegetation, and utility systems appropriate for humid tropical climates. The findings show that the site’s position between the sea and the mountains, combined with full-day sun exposure, requires design strategies that maximize cross-ventilation, utilize sloped roofs, provide natural shading, and apply local materials such as wood, bamboo, and red brick. The large spatial needs based on visitor capacity projections are accommodated through a flexible cluster layout that supports visual and functional connectivity between buildings while incorporating green open spaces to enhance microclimate comfort. The utility system is designed using sustainability principles through greywater–blackwater separation, infiltration wells, and recycling-based waste management. This study confirms that the application of tropical architecture in coastal tourism areas can improve thermal comfort, energy efficiency, and environmental sustainability. These findings guide developing tropical tourism area designs that are more adaptive to climate change and more responsive to visitor needs.

This study aims to analyze the performance of a simple cooling device based on a fan and ice to improve thermal comfort in the female dormitory rooms of Pondok Pesantren Darunnaja, Bengkulu. The research used an experimental quantitative approach involving temperature and humidity measurements as well as perception data collected through Likert-scale questionnaires. The experiment was conducted in six dormitory rooms measuring 3 × 3 meters. The results indicated that the device was capable of reducing room temperature by approximately 3–5°C and increasing relative humidity to a moderate level. About 70% of respondents reported an improvement in thermal comfort after using the device. Although the cooling effect was not optimal, the fan-and-ice-based system proved effective in creating a more comfortable indoor thermal environment. This simple cooling technology is cost-efficient, energy-saving, and environmentally friendly, making it suitable for application in dormitory or low-cost housing environments.

This study aims to analyze the differences in thermal conditions between coastal and riverside settlements, focusing on variations in temperature, humidity, and wind speed during day and night. The research sites include the coastal area of Dusun Karama Tengah (seaside) and Desa Salotengnga (riverside). Measurements indicate that the coastal area experiences more extreme daytime temperature fluctuations, reaching nearly 39 °C, with nighttime temperatures remaining warm and showing noticeable variation among points. In contrast, the riverside area displays more stable temperature patterns, with nighttime temperatures ranging between 28–30 °C. Relative humidity along the coast increases consistently at night, whereas in the riverside area it is heterogeneous, varying from saturated to very dry conditions. Wind speed serves as a key differentiating factor: the coastal area is still influenced by land–sea breezes, while the riverside environment tends to be stagnant with weak natural ventilation. These findings highlight distinct thermal comfort challenges in both settings—coastal areas are prone to daytime heat stress, whereas riverside areas face nighttime discomfort due to humidity and air stagnation. The results provide a foundation for adaptive architectural and spatial design strategies responsive to local microclimatic contexts.  

This study examines how lighting perception influences reading focus and satisfaction in book cafés in Bandung, Indonesia. A descriptive quantitative approach was employed, involving a preference survey and an experimental study conducted at a selected book café. Thirteen female participants were assigned to three distinct seating areas characterized by different lighting conditions. Participants completed reading tasks and evaluated their environmental comfort, focus level, and reading satisfaction. The findings indicate that lighting comfort significantly correlates with focus (ρ = .000, p < .01) and reading satisfaction (ρ = .016, p < .05), although focus and satisfaction were not significantly related. ANOVA results revealed a significant difference in perceived lighting comfort across seating points, with the most favorable conditions found at Point A. These results underscore the importance of lighting design in enhancing the reading experience in multifunctional public spaces such as book cafés. Future research should consider additional environmental variables, including noise and thermal comfort.

Air circulation and natural lighting are among the key aspects influencing the comfort of room usage, particularly in dormitory buildings inhabited by university students. This study aims to explore thermal comfort more deeply, focusing on air circulation and natural lighting within student dormitory rooms in the Riau Islands. A qualitative method was employed, collecting up-to-date data on the selected building. Building simulations using Computational Fluid Dynamics (CFD) and DIALux were conducted to analyze the speed of air circulation and the quality of natural lighting within the rooms. The results reveal that prior to evaluation, the dormitory rooms faced thermal issues related to poor air circulation and insufficient natural lighting. Wind speed was recorded at less than 2 m/s, and the incoming and outgoing airflow collided due to the presence of only one ventilation access. The evaluation using cross-ventilation through room openings showed a positive impact on indoor air circulation, increasing wind speeds to 2–4 m/s. The cross-ventilation concept also enhanced the discharge and exchange of indoor air, preventing air stagnation. In terms of natural lighting, the simulation showed that lighting intensity in several rooms was below the minimum standard of 250 lux, particularly in areas far from the window openings. After modifications to the window layout and the addition of secondary light-transmitting elements, the lighting level significantly improved to meet the recommended standard. These findings highlight the importance of incorporating both passive ventilation and natural lighting strategies in student dormitory designs. Improving these environmental aspects not only enhances thermal comfort but also supports the health, productivity, and well-being of the residents. This study contributes to the growing body of research on sustainable dormitory design and can be used as a reference for future architectural planning and policy improvements.

The design of Lecturer Housing for Campus 4 Gorontalo State University is a strategic necessity in line with the expansion of educational institutions and the increasing number of educators requiring adequate and proximate housing. The primary objective of this research is to produce a lecturer housing design that is not only adaptive and sustainable, but also harmonized with the Regional Spatial Plan (RTRW) of Bone Bolango Regency. The research methodology encompasses a comprehensive site analysis, examining aspects such as climate conditions, topography, vegetation patterns, infrastructure and utility networks, ambient noise levels, and site accessibility. Furthermore, a zoning and spatial relationship study was conducted to determine effective space allocation based on the principles of tropical architecture and green building practices. The findings of the study highlight that a north-south building orientation significantly reduces heat absorption, while the integration of cross-ventilation strategies enhances natural airflow and thermal comfort. Spatial zoning into public, semi-public, private, and service areas allows for organized layouts and promotes social interaction among residents. Sustainability is reinforced through the application of green architectural technologies, including the use of green concrete, lightweight steel frameworks, solar energy panels, as well as integrated waste-water management systems that separate black water and grey water. Landscaping elements, both softscape and hardscape, are utilized to enhance aesthetics while supporting ecological balance and rainwater absorption. This design proposal contributes to the broader discourse of sustainable tropical housing and may serve as a replicable model for future lecturer housing projects in similar regional contexts. It emphasizes the importance of environmentally responsive, cost-efficient, and socially supportive residential architecture.

This study presents an evaluation of the cooling load capacity in the departure apron corridor area at Supadio International Airport using the Cooling Load Temperature Difference (CLTD) method. The objective of the research is to assess whether the current air conditioning (AC) is adequate to meet thermal comfort requirements in a tropical climate characterized by high humidity and strong solar radiation. A detailed field survey was conducted at Gate 3, a glass-dominated corridor that experiences significant heat gain from solar exposure. Empirical data including temperature profiles, material properties, occupancy levels, and equipment specifications were collected over a two-week period using digital instruments. Using the CLTD method, the heat contributions from walls, roof, glass surfaces, occupants, lighting, and air infiltration were quantified. The results revealed that the installed AC (2 PK) only delivers about  of the required cooling load, with the total load estimated at 66,448 BTU/hr. The dominant sources of thermal gain include the roof and east-facing glass panels. The study recommends AC resizing, glass shading implementation, and improved insulation to enhance energy efficiency. This research contributes practical insights for HVAC optimization in airport infrastructure within hot-humid climates.

Global climate change has become a serious challenge that affects various aspects of life, including the field of architecture, especially in tropical climates. Increasing environmental temperatures and changing weather patterns have a significant impact on the thermal comfort and energy efficiency of buildings. This article aims to explain strategies for applying bioclimatic architectural principles as design solutions that are responsive to local climate conditions. Through systematic literature analysis, it was found that architectural design that considers climatic factors can increase comfort for occupants and reduce dependence on artificial lighting and lighting systems. This article also discusses various strategies for applying bioclimatic principles, such as the placement of the building's core orientation, window openings, balconies, transitional spaces, wall design, landscape relationships, passive shading, and heat insulation on the floor, where the application of these strategies can help create a more beautiful building. sustainable and energy efficient. Therefore, the application of bioclimatic architecture is very important to create buildings that can adapt well and efficiently in tropical areas.  

This study investigates optimal retrofit strategies for buildings in tropical climates, focusing on energy efficiency, thermal comfort, and indoor air quality (IAQ). Given the unique challenges of high temperatures, humidity, and energy demands in tropical regions, traditional retrofitting methods often fall short of achieving a balance between these critical factors. By employing a multi-objective optimization approach, this research identifies the most effective combination of retrofit solutions, including insulation, natural ventilation, and high-performance window treatments. The results show that the proposed retrofit strategy significantly reduces cooling energy consumption, while maintaining or improving occupant comfort and IAQ. Insulation, particularly external insulation, proved to be the most effective in reducing heat transfer, while natural ventilation strategies and advanced materials further contributed to improving thermal regulation. The study demonstrates that integrating passive and active retrofit measures, tailored specifically to tropical climates, leads to optimal building performance. The multi-objective optimization algorithm (NSGA-II) allowed for the generation of Pareto-optimal solutions, offering a set of trade-offs between energy efficiency, thermal comfort, and IAQ. These findings are particularly relevant for policymakers and building professionals seeking sustainable retrofit solutions in tropical regions. The study also highlights the importance of integrating energy efficiency and IAQ considerations in retrofit strategies to avoid compromising occupant health. Further research is recommended to explore the integration of advanced materials, such as phase change materials (PCMs), and to enhance IAQ management in retrofitted buildings, ensuring long-term sustainability and occupant well-being in tropical environments.

Indonesia merupakan daerah yang sering mengalami gempa bumi karena itu, konstruksi bangunan harus didesain sesuai dengan standar peraturan yang berlaku. Penelitian ini bertujuan untuk mengetahui perilaku struktur dan skema terjadinya plastifikasi pada elemen struktur, serta menentukan level kinerja struktur gedung agar tetap kokoh saat terjadi gempa. Analisis pushover dengan displacement coefficient methode FEMA 440 (2005) yang berbasis statik nonlinier digunakan untuk mengetahui level kinerja struktur bangunan. Studi kasus dilakukan pada gedung beton bertulang RND PT Bernofarm Sidoarjo yang berfungsi sebagai kantor dan laboratorium di bidang farmasi. Gedung tersebut dibangun pada tahun 2015 dengan 6 lantai dan tinggi 28 meter. Sendi plastis baru dapat diketahui dengan melakukan analisis pushover. Digunakan program ETABS v.19 dan SAP2000 v.22 untuk analisis pushover sehingga diperoleh nilai perpindahan untuk arah X dan Y sebesar 0,311 m sehingga level kinerja struktur gedung ialah Damage Control. Pada kategori ini, bila terjadi gempa, elemen struktural gedung mengalami kerusakan minimal sehingga gedung masih dapat digunakan setelah terjadi gempa, namun fasilitas atau kelengkapan operasional gedung mungkin ada yang tidak dapat digunakan sehingga diperlukan perbaikan sebelum digunakan kembali. Ancaman terhadap korban jiwa sangat kecil.