Development of HVAC diffuser unit for task and ambient air conditioning allowing user to control built-in fan - Evaluation of air supply mode by subjective experiment and field measurement in office

Takashi Akimoto, Naoya Odagiri, Yoichi Nakashima, Seiji Miyazaki, Takashi Yanai, Takashi Matsumoto, Daiki Yamashina, Nana Araki

Research output: Contribution to journalConference article


HVAC diffusers have been developed that have dual functions for task and ambient air conditioning. In this study, we evaluated comfort according to air supply mode, strong or fluctuation mode, through a subjective experiment. We found that the fluctuation mode maintained greater comfort for longer compared with the strong mode under continuous airflow exposure. Therefore, the fluctuation mode is considered suitable for long-duration use. Moreover, field measurements in an actual office showed that the fluctuation mode was superior in terms of both comfort and energy saving compared with conventional air conditioning.

Original languageEnglish
Article number01025
JournalE3S Web of Conferences
Publication statusPublished - 2019 Aug 13
Event13th REHVA World Congress, CLIMA 2019 - Bucharest, Romania
Duration: 2019 May 262019 May 29


ASJC Scopus subject areas

  • Environmental Science(all)
  • Energy(all)
  • Earth and Planetary Sciences(all)

Cite this