The use of tracer gas methods for detailed airborne moisture transport study in buildings.

Three different examples illustrate the possibilities offered by the use of tracer gas methods for detailed airborne moisture transport studies in building. The first one concerns an individual dwelling with severe condensation problems, the second one gives an example of statistical data collection of humidity related parameters in 18 apartments and the last one focuses on the evaluation of the amount of water evaporating from the building materials of a recently built low energy dwelling and on the energy consumption required for drying the construction. The paper deals on the one hand with the methodology employed for the measurements, on the other hand with the practical results that were obtained.