This study aims at investigating the actual conditions of indoor environment in schools in order toobtain fundamental information for proper ventilation design of buildings. Indoor environment of twonew elementary schools in Tohoku district of Japan was investigated for a week in the winter 2005.Temperature and humidity, concentrations of Carbon Dioxide (CO2), ventilation airflow rates,concentrations of chemical substances, and the opening condition of the windows and doors weremeasured in the three classrooms of each school.
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