Diurnal and seasonal variation in air exchange rates and interzonal flows measured by active tracer gas in five Danish homes

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We measured the air exchange rates (AER) in up to six rooms in five naturally ventilated dwellings across four seasons using active tracer gas. Night time AER was also estimated in all bedrooms based on occupant-generated CO2. Additionally, we studied the pollutant distribution across the dwellings and airflows between rooms. AERs changed rapidly during the day and differed between rooms. Occupant behavior (window opening) strongly influenced the AERs. AERs were highest in the summer, lowest in the winter. Interzonal airflow measurements indicated that the air within a given floor is well mixed, while there is less air movement between different floors. The position of the internal doors (open/closed) had a strong influence on the air movements within the dwelling.
Original languageEnglish
Title of host publicationProceedings of Indoor Air 2016
Number of pages2
Publication date2016
Article number1193
Publication statusPublished - 2016
Event14th international conference on Indoor Air Quality and Climate - Ghent, Belgium
Duration: 3 Jul 20168 Jul 2016
Conference number: 14


Conference14th international conference on Indoor Air Quality and Climate


  • Residences
  • Natural ventilation
  • Tracer gas measurements
  • Spatial and temporal variation

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