Impact of orientation, aspect ratio, WWR on natural ventilation of non-high-rise residential building in a warm-humid climate

Published 07-12-2023
Section Research Articles


  • Krithigadevi V Department of Architecture, National Institute of Technology, Tiruchirappalli, India
  • K. Bhagyasri Department of Architecture, National Institute of Technology, Tiruchirappalli, India


Aspect ratio, Natural ventilation, Building orientation, warm-humid climate, comfort ventilation


Due to urbanization and population growth, cities are developing their infrastructure to accommodate everyone moving to metropolitan areas. As a result, the local government's planning and development regulations for buildings are increasingly emphasizing built-up areas, which raises building density. These building development rules have yet to consider the natural ventilation potential. External obstruction, especially surrounding buildings, will have a more significant impact on natural ventilation. This study investigates the effect of the factors such as orientation, canyon aspect ratio, and WWR of the building on the natural ventilation potential inside the building. The residential complex, constructed based on the Tamil Nadu Combined
Development and Building Rules, 2019 (TNCDBR), is selected to study natural ventilation. Parameters like air temperature,
relative humidity, and wind speed are measured on-site and analyzed. The aim is to Evaluate the natural ventilation in the
residential cluster compared with the comfort ventilation standards of NBC. Results indicated the impact of the building's orientation, WWR, and aspect ratio. The findings of this study intended to increase the understanding of natural ventilation potential in residential buildings and thus provide information for urban planning and building design.