Bulgarian
EnglishAir filter table
Groups of filters
| Group of filters | Trapped particles | Class | Application |
| Filters for coarse particles (>10 micron) |
Insects,Textile fibres, Fluff, Sand, Pollen, Cement dust | G2 G3 G4 |
Protection from insects. Filters for supply and return of air. Filters for preliminary purification in spray booths. Filters for preliminary purification in filter systems, equipped with filters of classes F5 — F9 ( M 5 – F 9) |
| Filters for small particles (from 1 to 10 micron) |
Spores, Fluff, Cement dust, Bacteria, Dust from the ambient air |
F5 M5 F6 M6 | Filters for submission of ambient air for rooms without high requirements, Filters for supply and return of air, Filters for preliminary purification in filter systems, equipped with filters of classes E10 and E11 |
| Filters for small particles (from 1 to 10 micron) |
Tobacco smoke, Metal oxide fumes |
F7 F8 F9 |
Filters for final purification of air in administrative offices, museums, airports, hospitals, electrical power stations. Filters for preliminary purification in filter systems, equipped with filters of classes E12 — H14 |
| Filters type EPA for particles smaller than 1 micron | Bacteria, Viruses, Tobacco smoke, Metal oxide fumes, Microbes |
E 10 E 11 |
Filters for final purification of indoor air, meeting high requirements (laboratories, pharmaceutical enterprises, electronics manufacturing, etc.). |
| Filters type HEPA | Microbes | E12 | Filters for final purification of indoor air, meeting class 5 and 6 according to EN 1822 |
| Filters type HEPA | Microbes, Aerosols | H13 | Filters for final purification of air in nuclear power plants, Filters for supply of air in operating units. Filters for final purification of indoor air, meeting the requirements for class 3 and 4 according to EN 1822. |
| Filters type НEPA Filters type ULPA |
Aerosols | H14 U15 U16 U17 |
Filters for purification of indoor air in electronics and pharmaceuticals companies. Filters for final purification of indoor air, meeting the requirements for class 1 and 2 according to EN 1822. |
Classification
| EN — 779 Classification | EUROVENT Classification | Average Arrestance /A %/ | Average Efficiency /E %/ |
|---|---|---|---|
| G 1 | EU 1 | Am < 65 | — |
| G 2 | EU 2 | 65 ≤ Am <80 | — |
| G 3 | EU 3 | 80 ≤ Am <90 | — |
| G 4 | EU 4 | 90 ≤ Am | — |
| F 5 | EU 5 | — | 40 ≤ Em <60 |
| F 6 | EU 6 | — | 60 ≤ Em <80 |
| F 7 | EU 7 | — | 80 ≤ Em <90 |
| F 8 | EU 8 | — | 90 ≤ Em <95 |
| F 9 | EU 9 | — | 95 ≤ Em |
| Initial Efficiency E | E° < 20% | E° ≥ 20% | |
| Final Pressure drop | 250 Pa | 450 Pa |