Wolfgang Horn
Bibliographic info:
4th International Symposium on Building and Ductwork Air Tightness - BUILDAIR (former European Blower Door Symposium), 1-2 October 2009, Berlin, Germany

The developed method uses Radon as natural tracergas, which appears everywhere in the nature hence in all buildings as well. Contrary to blowerdoor-measurement, pressure and suction areas are coevally available, depending on the pressure difference due to wind and temperature. Generally, suction areas overweight due to wind. Depending on the size of the building and the objective target, the measurements last about 6 days, min. 1 day until max. a few weeks. In this process, all interior doors can be left closed or opened, depending on default and use. Only at night all doors and windows of the room where the measurement takes place must be closed. The building is not restricted in its usage, so very realistic measurements are possible.