The final purpose of this study is to propose a thermal performance evaluation method for passive and low-energy buildings that considers the effects of the residents' behavior. As one of a series of researches, we conducted an experiment with subjects for investigating the thermal comfort zone used to the evaluation method. In the experiment, the subjects lived in an actual house without any heating/cooling equipment. They followed a schedule that included movements between the rooms and three types of actions. And they were allowed to change their clothes according to their thermal sensation. From the experiment, we proposed the predicted thermal sensation votes (PTSV) as new comfort index. In addition, the PTSV comfort zone with conditions that are best suited to the residents is proposed as “thermal comfort zone of daily life in residence”, considering the adjustments by residents.
