VENTILATION EFFECT AND THERMAL ENVIRONMENT INDUCED BY ENVIRONMENTAL CONTROL AS A MEASURE FOR COVID-19 IN ELEMENTARY SCHOOL CLASSROOMS WITH MECHANICAL VENTILATION EQUIPMENT IN TOKYO

Abstract

Air temperature and CO2 concentration were measured in classrooms with ventilation system from April 2018 through March 2022. It is assumed that, under the COVID-19 circumstances, windows of the classrooms, where ventilation system was working, were basically kept open throughout a year. The average air temperature at foot level was 11℃ during winter period because of cold outdoor air infiltration. The estimated ventilation rate tended to decrease during winter period. However, the estimated ventilation rate per person more than 30 m3/h was obtained in case of half number of pupils in the classroom with Hybrid-Flexible lesson for the whole day.