Air Filters for Ventilating Systems-Laboratory and In Situ Tests, 1997 Nonwovens Conference Proceedings
Innumerable laboratory test methods using different synthetic dusts have been developed for measuring and characterizing air filters.
The interest in IAQ and problems associated with air pollution has created new standards for testing air filters removal of particles in laboratories as well as in situ.
Still a laboratory test could give very misleading results compared with the filter behavior in atmospheric air. The efficiency can decrease dramatically in a real application, which could not be foreseen by testing with coarse dust in laboratory.
For better understanding of IAQ problems the measurement of particles also have to be extended to analyze of the particles regarding shape, type and risk factor.