DS EN 1822-4:2009
DS EN 1822-4:2009 High Efficiency Air Filters (Epa, Hepa And Ulpa) - Part 4: Determining Leakage Of Filter Elements (Scan Method) Pertains to efficient air filters (EPA), high efficiency air filters (HEPA) and ultra low penetration air filters (ULPA-filters) used in the field of ventilation and air conditioning and for technical