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Freudenberg Filtration Technologies
Air Filtration

Standards and Certifications

You can rely on

Freudenberg Filtration Technologies stands for best quality. This means for you: more security in daily use. Our consistent commitment to the highest standards is also reflected in the diversity of our certifications and quality improvement initiatives.

EUROVENT fine filter certification

The EUROVENT Certification Company as an independent institution has developed an international certification program for fine filters of groups M and F (EN 779:2012), which gives the user security. Viledon fine filters are certified by EUROVENT.

EUROVENT energy efficiency classification system

The European Committee of Air Handling and Refrigeration Equipment Manufacturers (EUROVENT) developed a European energy efficiency classification system for air filters as part of the EUROVENT Certification, which is decisively co-developed by Freudenberg Filtration Technologies.


ISO 16890

The new test standard ISO 16890 for filter testing and assessment is likely to replace EN 779 by the end of 2016, with a transition period of 18 months. In future, filter efficiencies will be determined with regard to the particulate classes PM1, PM2,5 and PM10.

EN 779:2012

The EN 779 "Particulate air filters for general ventilation" defines the test procedure for coarse and fine dust filter. Force since April 2012 version EN 779:2012 includes the introduction of minimum efficiency levels for classes F7 to F9, and the renaming of classes F5 and F6 to M5 and M6.

EN 1822 and ISO 29463

In Europe, EPA, HEPA and ULPA filters are subject to classification according to EN 1822 for filtration efficiency and zero leakage. HEPA and ULPA filters are also subject to individual tests. The international standard ISO 29463 is based on European standard EN 1822 and will probably replace this standard in the future. Both standards are based on the latest particle counting methods.

Dust class according to DIN EN 60335-2-69 appendix AA

Filter media used in dust removal machines is tested in according to the SBM dust class DIN EN 60335-2-69 appendix AA. The maximum degree of penetration decides whether a filter material is classified as an L, M or H class.

EN 13779

The EN 13779:2007 controls the ventilation in non-residential buildings and provides general principles and requirements for air conditioning and space cooling systemsThe air quality of the room air, e.g. the supply air, the exhaust air and the outside air is classified depending on different criteria in two to five classes.

DIN 1946-4

End of 2008, the Standards Committee for Heating and Ventilation (NHRS) has released the DIN 1946-4:2008-12This standard regulates the operation of HVAC systems in buildings and rooms of health care and replace the DIN 4799 "air flow systems for operating rooms". In section 6.5.7, the requirements for air filtration in hospitals are described.

VDI 6022

The guideline VDI 6022 “Hygiene requirements for ventilation and air-conditioning systems and units”, Part 1, April 2006 sets out the requirements for HVAC systems in design, manufacture, installation, operation and maintenance, which are useful or necessary for hygienic operation in ensuring the protection of people.

EN ISO 14644-1

The EN ISO 14644 standard describes the requirements for cleanrooms and associated cleanroom areas. In production rooms, the purity levels of the air vary depending on the product as stipulated in EN ISO 14644-1. This guideline classifies rooms according to their particle count per cubic meter (depending on particle size).

EHEDG Doc. 47

European legislation requires that the handling, processing and packaging of food should be carried out under hygienic conditions. Equipment manufacturers and operators are also directly responsible for implementing these requirements. The European Hygienic Engineering & Design Group (EHEDG) provides guidance on the most important requirements in accordance with national and international laws. Information is provided in EHEDG Doc. 47 on the proper use of ventilation systems to meet the hygienic requirements of food production.

DIN 53438

During the testing of combustible materials in accordance with DIN 53438, a burner is used to simulate the effect of flames. In the process, burning time of the specimen is measured from the first application to the extinguishing of the flame, or until the tip of the flame has reached the upper measurement level on the burning specimen. Viledon filter media are subjected to surface flame exposure (DIN 53438-3). They are self-extinguishing and thus correspond to Fire Class F1.

ATEX (2014/34/EU; 1999/92/EC)

The term ATEX is derived from the French term ATmosphere EXplosibles and has represented the European standard for explosion protection for over 20 years. These guidelines are aimed at manufacturers and operators of equipment and protective systems used in potentially explosive atmospheres. Also Viledon air filters offer an anti-static equipment that encounters electrostatic ignition of gases or dusts. Viledon air filters also offer an antistatic finish to prevent the risk of electrostatic charges created by gas or dust.


Viledon ChemControl filtration systems meet all relevant international quality and performance standards, including the world's most important: the standard 71.04-2013 by International Society of Automation (ISA) for corrosion degree in electronic and electrical equipment.