Filter classification

The filter group The level of filtration The examples of separated particles material Recommendation for application
of air filters
G

Filters for coarse dust particles

Efficient for particles ≥ 10 μm

EN 779

G1
G2
  • Leaves
  • Insects
  • Textile fibres
  • Sand
  • Flying ash
  • Mist
  • Hair
Only for simplest application (e.g. protection against insects)
G3
G4
  • Flower pollen
  • Pollen
  • Fog
  • Waste air of painting boxes and kitchens
  • Protection against the pollution of air conditioning and compact instruments (e.g. window air conditioning, fans)
  • Pre – filters for the filtration classes F7 and F8( it is necessary only for heavy polluted input air)
  • Pre filters and circulation filters for public protection equipments
F

Filters for fine dust.

Efficient for particals ≥ 1 μm

EN 779

F5
  • spore
  • Cement dust
  • Particles creating stain or dust sediment-
    ation
  • Entering filters for the areas with low demand(e.g. workshops,storages,garage)
  • Pre-filters for the filtration class F8 and F9.
F6
  • Bacterium
  • Embryo on the carrying parts
  • The entering filters for the area with low demand(e.g. selling areas,specific production area)
  • Pre-filters for the class filtration F9 and H10
  • Filters for waste air for heat exchanger and recuparator
F7
F8
  • Acumulated carbon black
  • So called dust going through lung
  • Circulating filters in air conditioning
  • End filters in air conditioning pro average request e.g. shops,offices and specific production areas.
  • Pre filters for the filtration class H11 and H12.
F8
F9
  • Tobacco smoke (roase fractions)
  • Metal oxide smoke(soarse fractions)
  • Oil smoke
  • The end filters in air conditioning for higher requests e.g. offices, workshops, telecommunication centres, laboratories etc.
  • Outside air equipments in hospitals
  • Digital phone exchanges
  • Pre-filters for the filtration class H13 and H14
  • Pre-filters for adsorbable filters(e.g. filters with active carbon)
  • Pre-filters in pharmacy
H

Filters for micro particles.

Efficient for particles ≥ 0,01 μm

EN 1822

H10
H11
  • Embryos
  • Tobacco smoke
  • Smoke of metal oxide
  • Swirl on th carrying particles
  • Carbon black
  • End filters for the area with high request (e.g. laboratories and hospitals)
  • End filters for “clean areas”, classes  ≥ ISO 7 in pharmacy, food, optitions and light industry
H12
H13
  • Oil smoke in the initial stage
  • Aerosol micro particles
  • Radioactive aerosol
  • End filters for hospitals with higher requirements but without any prescription for leakeage test
  • End filters for food. electronic, pharmacy and foil industry
  • Filters for waste air in nuclear technics
  • End filters for “clean area” classes  ≥ ISO 5
  • The end filters in public protection equipments
H14
  • Aerosol micro particles
  • Swirl
  • The end filters for “clean areas” classes ≥ ISO 4
  • The end filters for pharmacy, hospitals with higher requirements and strongest rules for the leakage tests
U

Filters for micro particles

EN 1822

U15
U16
U17
  • Aerosol micro particles
  • End filters for “clean areas” classes  ≥  IS0 3
  • End filters for “clean areas” classes  ≥  IS0 2
  • End filters for “clean areas” classes ≥  IS0 1
A

Filters with active coal

Active coal (not impregnated coal)
  • Light volatile hydrocarbon VOC’S
  • Asphalt, tar and petrol and kerosine fume
  • Solvent fume
  • Body civilisation and hospital smell
  • Food, kitchen and rotting smell
  • Catching smell at airports, offices and public buildings, hotels, hospitals.
  • Decreasing the syndrom of ill buildings
  • Input filtration in microelectronic
  • Removing the harmful gases from recirculing air
The filtration of gases (Impregnated active coal)
  • Acid spot gases
  • SO2, S04, NO2, NOx
  • HCl, H2SO4, H2S, HF, Cl2
  • Input filtration fot control center (e.g. at the airport)
  • Input and circulating filters for eechange center in agresive conditions.
  • Computers area
  • Input and circulating filters for microelectronic
It is not standarised (Impregnated active coal)
  • Amine
  • NH3, NH4
  • NMP, HMDS
  • Circulating filters in microelectronics

Filter efficiency