Experimental and Numerical Evaluation of Reducing Indoor CO2 Levels Through Natural Ventilation

by Filiz Firdevs SARAÇ, Şuheda Cemre SARI, Zahide Nur MANTAR

Izmir Institute of Technology, June 2025

Abstract

EN TR

This study investigates the potential of natural ventilation systems to reduce indoor carbon dioxide (CO2) levels and improve indoor air quality. It also aims to contribute to energy efficiency by reducing the need for mechanical ventilation. To evaluate indoor air quality through CO2 levels, natural ventilation scenarios are analyzed using computational fluid dynamics (CFD) and wind tunnel experiments. This two-way approach enables the development of a reliable model supported by both physical and numerical data. In the study, the effects of cross- and unidirectional ventilation strategies on CO2 emissions under different wind speeds and directions are analyzed. The potential of natural ventilation to reduce energy consumption is evaluated within the framework of İzmir's climate conditions. The findings obtained can contribute to both improving indoor air quality and sustainable building design and can form the basis for the development of climate-specific natural ventilation solutions. In this respect, the study aims to increase the applicability of natural ventilation designs on a wider scale and to provide a scientific reference for future applications.