Wind tunnel and on-site pressure distribution measurements on a house and its effects on infiltration

Summarizes measurements made on a flat. These include inside to outside temperature and pressure differences, infiltration rates using helium as a tracer gas, duration of opening windows and doors and weather conditions. Also describes wind tunnel measurements made on a model of the building with and without obstacles and terrain roughness. Concludes that there is reasonable agreement between wind-tunnel and on-site pressure measurements, that opening two small windows on the windward side may increase the infiltration rate by a factor of two, that the length of time a window is opened is better correlated with temperature than wind.