Automation, extension and use of the PCL multi-tracer gas technique for measuring interzonal air flows in buildings.

Describes the development of an automated air sampling equipment to measure air infiltration and interzonal air flows. A new matrix analysis method has been developed to calculate single zone infiltration and interzonal air flow rates from measured data. A number of multi-zone experiments have been carried out in the PCL solar heated house at Peterborough, and several single zone infiltration rate measurement experiments have been carried out in a widevariety of buildings. A grab-tube method has been developed for assessing air change rates.