Optimal temperature setting of indoor air-conditioning after walking outdoors in supmmer and winter

The aim of this study is to investigate an optimal air-conditioning adjustment for an indoor space where people come in and out. The authors conducted the experiments by measuring the physiological and psychological responses of subjects who walked outdoors and then entered a chamber. Psychological responses to summer climate were grouped within three categories of: "cool" - "comfortable," "hot" - "uncomfortable," and "cold" - "uncomfortable." These responses are related with subjects perspiration. It seems impossible to completely eliminate "uncomfortable" conditions by controlling room temperature or humidity. Thus, a personal air-conditioning system is recommended. In winter, there were few "cold" responses at 25 deg C, although there were some at 22 deg C. "Cold" responses occurred when the outdoor temperature was low. Therefore, it appropriate temperature adjustment seems to be effective. If the outdoor temperature is low, a high room temperature is required.