Several studies have been conducted to improve the workplace productivity and many of them focused on the office room environment to increase productivity and save energy. In this study, both office and break rooms have been analyzed because workers often move between the two during their working hours. The proposed productivity improvement method is called integrated thermal control method that simultaneously controls the room temperature in both office and break rooms using thermal gap between the rooms to improve intellectual concentration. The proposed method was evaluated by an experiment. The results showed that intellectual concentration can be improved by reducing the time taken to resume work after a break by utilizing the thermal gap.

In rooms with large windows, the thermal environment tends to deteriorate owing to thermal radiation, cold draft, and vertical temperature difference during air-conditioned heating in winter. There have been several complaints regarding large windows that result in decreased heat generation in office buildings. The importance of preliminary examination of the building / specific equipment at the time of designing is increasing. In this paper, the floor surface temperature before air conditioning and the vertical temperature difference during air conditioning were analyzed by measuring the thermal environment in office buildings. In addition, a simplified prediction method for vertical temperature differences is proposed that can be used at the early stages of design is proposed. It implements unsteady-state simulation by vertical temperature distribution prediction model. The results are compared with the measured values.