Comparison Of HEPA/ULPA Filter Test Standards Between America And Europe

This paper compares the difference of HEPA/ULPA filter test standards between America andEurope from test procedures, aerosol types and its size, to air filter classification. Both of them adopt MPPS method as their trend. According to EN1822, it is recommended to combine the test rigs for efficiency test and leakage test in practice. Influence of different scanning velocity on sampling accuracy, leakage and efficiency test accuracy need further studied and reasonable scanning velocity should be fixed. According to Rongyi Zhaos theoretical analysis, dilution method to test high test aerosol concentration may not be correct, and reasonable test methods instead of dilution need to be further studied.