Experimental study on CO₂concentration and indoor thermal comfort pf different classrooms during new normal in the University of Kitakyushu

Indoor thermal comfort and indoor air quality in educational buildings are essential for students' health and learning performance. In this pandemic situation, regulation of door and ventilation opening in the classroom for offline class become important for infection spread prevention. Based on Japan Ministry of Health, Labour and Welfare standard, CO2 concentration level shall not exceed 1,000 ppm to prevent infection spreading. Yet significant amount of door and ventilation opening may reduce the level of thermal comfort because the Air-conditioning leakage. This study aims to evaluate CO2 concentration and indoor thermal comfort in two classrooms with door and ventilation opening regulation. In this study, the experimental measurements conducted in spring and summer season in The University of Kitakyushu. The method used in this study is by measuring air temperature, relative humidity, and CO2 concentration. The research results are expected to be a reference for the optimal application of regulations for thermal comfort and infection spread prevention.