Very precise filters with very high filtration efficiency, classified as EPA and HEPA filters, are used in places where almost sterile air free of all impurities is required. Each copy should have an individual document of a quality certificate with test results confirming the filtration class E10 / EU10, E11 / EU11, E12 / EU12, H13 / EU13 or H14 / EU14. Such high accuracy is required due to the places of application of these filters, such as: operating rooms, scientific laboratories, electronics or drug production plants.
