Abstract
This paper indicates to improve thermal environment in a classroom at elementary schools. Actual conditions and problems of environment in the conventional south-facing classrooms were clarified from answers of teachers on a questionnaire, and the history of spread of south-facing classrooms was reviewed. From the point of environmental engineering, we proposed a passive type classroom applied passive solar systems such as a direct heat gain system and ventilation windows' in a mild climate and fine weather area in winter. The numerical analysis showed that thermal environment formed in passive type classrooms was better than that in south-facing classrooms.
