Measurement of air-change-rate in rooms without air-conditioning. Messung des naturlichen Luftwechsels in nichtklimatisieren Wohnraumen.

Describes the importance and purpose of measurements of air infiltration. Discusses methods of measuring air-change-rate and the range of measurements. Describes test method and gives preliminary results of practical tests made in living rooms during the winter of 1975/76. Results indicate that more detailed and comprehensive tests are necessary to obtain valid data for heat loss due to air infiltration in rooms and buildings and dependence of air-change-rates on year of construction and type of building.