Thermal Environment Generated by Occupant’s Opening Control of Window at Naturally Ventilated Building

A field survey in a natural ventilated school building was carried out. The purpose of this study is to figure out the occupant’s evaluation of thermal comfort as the result of opening control, which seems to be affected by the outdoor and indoor air condition.
Occupant’s active use of natural ventilation system instead of air conditioner is a key to the performance for energy saving of building. The analysis of the data shows that windows were more actively controlled as occupant’s knowledge about natural ventilation system increased. The result of this study suggests that understanding about the system leads more active control of window and less use of air conditioner, which play a grate role in saving energy.