Viledon App
Freudenberg Filtration Technologies
Air Filtration

Hygiene standards for maximum protection

Requirements for cleanrooms

Particularly strict regulations apply to cleanrooms. Airborne particles and germs must be reduced to an absolute minimum in order to protect highly sensitive products and processes.

Hygiene guidelines define clear specifications for ventilation and air-conditioning systems and units in sensitive application areas such as cleanrooms.

Classification of cleanrooms

For the 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 (m³).

Particle per m³
Class0.1 µm0.2 µm0.3 µm0.5 µm1.0 µm5.0 µm
ISO 1102
ISO 210024104
ISO 31,000237102358
ISO 410,0002,3701,02035283
ISO 5100,00023,70010,2003,52083229
ISO 61,000,000237,000102,00035,2008,320293
ISO 7352,00083,2002,930
ISO 83,520,000832,00029,300
ISO 935,200,0008,320,000293,000

In Europe, EPA, HEPA und 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.

Viledon air filters meet all hygiene requirements

Hygiene guideline VDI 6022 defines clear specifications for ventilation and air-conditioning systems and units in sensitive application areas such as cleanrooms. These requirements are in place to ensure the removal of harmful microorganisms and of inorganic and organic dust to protect sensitive products and processes.

Viledon air filters fulfill without restrictions all criteria of the VDI 6022 guideline “Hygiene requirements for ventilation and air-conditioning systems and units”. The materials used prevent bacteria and fungi from growing and moisture-resistant up to 100 % relative air humidity. The required hygiene inspections and regular inspections are carried out by our trained filter experts at the customer's place.