We made a series of subjective experiment for understanding the relationships between various cooling strategies such as cross ventilation, the use of small fans, the use of air conditioners, various behavioral patterns such as the choices of cooler paths approaching to the building in question, the change of clothes, and thermal sensations. The votes and behaviors of the subjects were recorded by video cameras so that the subjects were not forced to answer simplified single-scaled questionnaires and their behavioral patterns, which should be found in actual thermal environment, are not distorted. It was found that most of the subjects in a naturally-ventilated room were very sensitive to the fluctuation of the air current in the given thermal environment and at the same time very active in having coolness. It does not necessarily require lower temperature provided that the subjects reach the room walking in from the cooler outdoor environment. In the case of the set point temperature of 25℃, the subjects wearing ties felt cool and comfortable, though the subjects wearing no ties felt cold and uncomfortable. In other words, it is possible that wearing no ties enables the subjects to feel cool enough and comfortable with higher set-point temperature.
