Measurement of ventilation airflow rates of 39 houses by three different methods

Hiroshi Yoshino, Kuniaki Mihara, Rie Takaki, Teruaki Mitamura, Kazukiyo Kumagai, Miyuki Noguchi, Haruki Osawa, Yukio Yanagisawa

Research output: Contribution to journalArticlepeer-review


This paper reports on the measurement results of ventilation rates in existing occupied houses in the northern region of Japan. A total of 61 measurements were made over a period of 4 years on 39 houses. Some houses were measured once a year over the four years investigation period. The ventilation systems equipped in some of the investigated houses were improved during the course of this investigation period. The effect of the improvement on ventilation airflow volume was reported. The ventilation rates were measured by three different methods, namely constant concentration method, measurement of airflow rate at inlets/outlets and passive homogeneous emission method. Through this investigation, the measurement results indicated that the ventilation rate was insufficient in many houses and some of the ventilation systems were not operated properly. In addition, the amount of air leakage in the house envelope and the amount of air change due to occupant behaviour were also determined.

Original languageEnglish
Pages (from-to)299-311
Number of pages13
JournalInternational Journal of Ventilation
Issue number4
Publication statusPublished - 2010


  • Constant concentration method
  • Measurement of ventilation rate
  • Passive homogeneous emission method exhaust and inlet airflow measurements
  • Residential buildings

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Civil and Structural Engineering
  • Building and Construction
  • Electrical and Electronic Engineering


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