Peter Hansson, Hans Stymne, Anette Valfridsson
Bibliographic info:
Healthy Buildings 2003 - Proceedings 7th International Conference (7th-11th December 2003) - National University of Singapore - Vol. 2, pp 480-485, 5 Fig., 1 Tab., 3 Ref.

Tracer gas sorption in and permeation through building materials influence tracer gas ventilationmeasurements. Therefore, it is important to have knowledge about these processes.The permeation of three commonly used tracers (SF6, N2O and the PFT C6F6) through untreatedgypsum board has been experimentally investigated. The result shows that all three tracers diffusereadily through this material (diffusion coefficients in the order of 1 10.-6 m2/s). Caution shouldtherefore be exercised when using tracer gas measurements in rooms with walls of gypsum boardor other porous materials.