A study of the controllability of air movements in predominantly naturally ventilated houses.

The aim of this study is to measure interzonal airflows through different doorway openings, due to the effects of temperature difference and combined temperature and pressure difference. The method of measurement uses tracer gases which are injected into spaces and their growths and decays are monitored. These concentration histories, when suitably analysed, reveal the interzonal airflow rate. Empirical formulae describing the interzonal airflow rate as a function of temperature difference are derived for different door opening positions.The test measurements are split between controlled laboratory conditions and site conditions, which are subjected to the influence of the weather. Comparison is made between the two separate conditions, the parametric effects of the weather being investigated. The control of interzonal airflow rates in houses is investigated.