Model Experiment of Multizone Ventilation Efficiency

Hiroshi Yoshino, Yasuo Utsumi, Hiroshi Kobayashi, Muneshige Nagatomo

Research output: Contribution to journalArticlepeer-review


In airtight houses, it is important to control the ventilation airflow of each room in order to ensure good indoor air quality. Therefore, the mechanical ventilation equipment should be designed carefully, giving due consideration to the ventilation efficiency in rooms. This paper describes the ventilation efficiency of a three‐zone scale model with the experiment. The step‐down method is applied to clarify the age of air and other indexes of ventilation efficiency. The effects of ventilation airflow volume with no recirculation and of the recirculated airflow volume on ventilation efficiency are investigated.

Original languageEnglish
Pages (from-to)76-82
Number of pages7
JournalIndoor Air
Issue number1
Publication statusPublished - 1995 Mar


  • Experiment
  • Multizone
  • Recirculated air
  • Scale model
  • Step‐down method
  • Ventilation efficiency

ASJC Scopus subject areas

  • Environmental Engineering
  • Building and Construction
  • Public Health, Environmental and Occupational Health


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