Vol. 3 No. 3 (2025)

  • Open Access

    Article

    Article ID: 1632

    Energy and thermal load analysis of exposed brick houses on the coast

    by Hermawan Hermawan, Jozef Svajlenka, Elina Mohd Husini, Dwi Aryanto, Annisa Nabila Arrizqi

    Building Engineering, Vol.3, No.3, 2025;

    Energy conservation is an issue that is still being discussed in the architectural realm to create zero-net energy buildings. Buildings are considered to be significant contributors to energy waste, so they are a concern for experts in energy conservation issues. Buildings in hot areas require large amounts of energy in building operations. One of the hot areas is the coastal area. Residential houses on the coast of Indonesia use exposed brick materials. Energy use for buildings with exposed brick walls must be studied to create energy-efficient coastal buildings. The study aims to reveal the energy use and thermal load of residential houses with exposed brick walls on the coast. The study uses a simulation method using the Revit application. Data is obtained from a combination of field data and the Revit application. The analysis uses energy use analysis and cooling load analysis. Energy use analysis includes building performance factors, energy use intensity, life cycle energy use/cost, renewable energy potential, annual carbon emissions, and annual energy use/cost. The study results show that the energy use of residential houses in Demak is more significant than in Jepara. The characteristic of Demak, which has a higher air temperature than Jepara, is the main factor causing substantial energy use. Another condition is the architectural elements in each house that affect the thermal load on the building. The main findings obtained are that high air temperatures influence significant energy use. The shape of the building and ventilation elements of houses in Demak increase the air temperature in the room compared to houses in Jepara. Recommendations that need to be made are that when making a house, it needs to be designed to suit environmental conditions. The values of local wisdom in an area need to be maintained to increase the architectural value by providing thermal comfort for its occupants.

    show more
  • Open Access

    Article

    Article ID: 3228

    The evolving priorities in residential design: Health, sustainability, and age-friendly living spaces

    by Yue Lyu

    Building Engineering, Vol.3, No.3, 2025;

    In response to the growing global demand for age-friendly housing and the pressing need for healthier indoor environments for aging populations, this study empirically investigates and compares the efficacy of sustainable versus conventional building materials in elderly care facilities. Conducted over a six-month period in a subtropical region of China, the research employed a controlled, side-by-side experimental design in twelve residential rooms. We systematically quantified the impact of material choices on indoor environmental quality by monitoring key parameters: concentrations of PM2.5 and volatile organic compounds (VOCs), thermal and humidity regulation, and floor slip resistance. Results demonstrated that rooms utilizing advanced, low-emission materials (e.g., formaldehyde-free boards, bamboo composites, diatom mud) achieved a significant 30% reduction in PM2.5 and a 25% decline in VOC levels compared to rooms with conventional materials (e.g., medium-density fiberboard, solvent-based paints). Furthermore, these sustainable materials enhanced thermal stability, maintaining indoor humidity within an optimal 40–60% range, and improved wet-condition slip resistance by 200%, substantially mitigating fall risks. The findings translate into actionable, evidence-based design guidelines, emphasizing material specifications like low-VOC coatings and humidity-regulating wall systems. This work bridges material science, environmental engineering, and geriatric design, offering concrete strategies and policy implications for creating safer, healthier, and more sustainable living spaces for the elderly.

    show more
  • Open Access

    Article

    Article ID: 2478

    Evaluation of the microbiological indoor air quality at a commercial building in Muscat, Oman, utilizing an all-air multi-zone HVAC system

    by Muthuraman Subbiah, Sivaraj Murugan, Kumar Ayyappan

    Building Engineering, Vol.3, No.3, 2025;

    This study evaluates the microbiological indoor air quality (IAQ) of a commercial office building in Muscat, Oman, equipped with an all-air multi-zone heating, ventilation, and air-conditioning (HVAC) system operating under hot-arid climatic conditions. Active air sampling was conducted at multiple locations, including open-plan offices, outdoor air intake, supply air diffusers, fan coil units, and the humidification water tank of the air handling unit (AHU), across different seasons. Airborne bacteria were analyzed using incubation at 22 ℃ and 37 ℃ to distinguish environmental and human-associated microbial populations, while fungal concentrations were assessed at 25 ℃, with results expressed as colony-forming units per cubic meter (CFU/m3). For analytical consistency, data from the three office spaces investigated were aggregated and evaluated as seasonal averages. Bacterial concentrations in indoor air generally ranged from 32 to 496 CFU/m3 at 37 ℃ and 4 to 500 CFU/m3 at 22 ℃, indicating low to moderate contamination levels under normal operating conditions. In contrast, a pronounced increase in fungal concentrations was observed during the initial winter sampling, exceeding 2000 CFU/m3, which was attributed to an exceptional flooding event. Comparative analysis of outdoor air, AHU-treated air, and indoor air demonstrated that the HVAC system effectively reduced microbial loads during standard climatic conditions. The findings provide region-specific baseline data on microbiological IAQ and highlight the influence of HVAC operation, seasonal variation, and extreme environmental events on indoor bioaerosol levels in commercial buildings located in hot-arid climates.

    show more