The airtightness of buildings

Reports investigation to devise a simple method for measuring the airtightness of buildings which will provide clear results in conformity with a definite standard, swedish building regulations 1975. Consists of two parts; field measurements comprising overpressure and tracer gas methods using nitrous oxide, and a theoretical calculation of the infiltration of air into a building. Shows that a test method to measure the airtightness of buildings can be developed. However several field measurements and more detailed study of meteorological data are required,since wind and, to some extent, temperature exert a decisive influence as to what value is obtained regarding unintentional ventilation.