2024 Yes Enhancement and Homogenization of Indoor Air Quality in a Classroom Using a Vertical Airflow Ventilation Scheme https://www.mdpi.com/2305-6304/10/9/545 Park, Su-Hoon Asia Observational Ventilation rates Classrooms Ventilation Indoor air quality Age of air Computational fluid dynamics This study tested a vertical airflow system with ceiling inlets and floor outlets in a middle school classroom. Compared to conventional ventilation, it reduced average air age by ~15% and improved air distribution uniformity, enhancing air quality. 2022