Air filter Filter classes Filter classes

| Usage_ | Class_ | Performance | Performance_test | Particulate_size_approaching_100_retention | Test_Standard |
|---|---|---|---|---|---|
| Semi Hepa | H12 | 99.5% | Minimum value | >0.5µm | BS EN1822 |
| Hepa | H13 | 99.95% | Minimum value | >0.3µm | BS EN1822 |
| Hepa | H14 | 99.995% | Minimum value | >0.3µm | BS EN1822 |