Steba LR5 Mode D'emploi page 14

Structure of the high efficient filter system
14
1. PP Filter (Prefilter) can filter out dust and bacteria
which are bigger than 20µm out of the air. It additionally
helps to keep the HEPA filter more clean for a longer
duration
2. The HEPA (High Effizient Partikel
Abscheidung) Filter removes efficient dust, pollen and
bacteria bigger than 0,3µmand achieves therefore a
increasment in the air quality
3. This filter can neutralize harmfull environmental
gases. It is already activ at room temperature.
4. The active carbon filter can remove harmfull
substances from the air like dust and bacteria.