Historical
DIN EN 1822-5:2001
High efficiency particulate air filters (HEPA and ULPA) - Part 4: Determining the efficiency of filter elements; English version of DIN EN 1822-5 (Foreign Standard)
The document establishes a procedure for the determination of the efficiency of filter elements by means of particle counting using a liquid test aerosol. It allows a standardized classification of high efficiency particulate air filters in terms of their efficiency.
CONTENT PROVIDER
Deutsches Institut für Normung [din]
Deutsches Institut für Normung [din]