Abstract
The work is concerned with measuring interzone air movement and investigating its effect on condensation in traditionally built houses. Air flows through a doorway between the lower and upper floors of a house were measured using a tracer gas technique. To study the effect of the temperature difference on interzone air flows, the lower floor of a house was heated to various temperatures in the range 18–35°C using thermostatically controlled heaters. The upper floor was unheated. Two portable SF 6 systems fitted with electron-capture detectors were used for measurements of interzonal air flow. The doorway coefficient of discharge was found to be a function of the temperature difference between the two floors of the house. In the second part of the paper, the effect of interzone air movement on condensation is considered. A two-zone moisture transfer model was established and the effect of a kitchen extract fan on the air flow patterns in the house is discussed.
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