Measurement of hourly infiltration rate and air change rate in the apartment block La Chaumiere. Mesures du taux horaire d'infiltration et de renouvellement de l'air sur l'immeuble La Chaumiere.

Describes the measurement of infiltration and air change rates in one flat in an apartment block containing 24 flats. Gives the general principles of the pressurization method and tracer gas method for measuring air change rate and infiltration rate. In this situation uses N2O as the tracer gas and measures concentrations with an infra-red gas analyser. Measures the effects of opening and sealing windows, and of closing internal doors on the air change rate and air movement in the flat. Gives a brief resumee of the annual energy consumption of the building and calculates the amount of energy lost through air infiltration.