Dvigubas filtravimas
Dvigubo filtravimo sistema sulaiko dulkes ir kenksmingas daleles dviem etapais: pirmiausia oras praeina per pirminį didelio tankio filtrą, o vėliau per smulkių dalelių filtrą, sulaikantį net iki 0,3 μm dydžio dulkių daleles. Tokiu būdu į patalpą tiekiamas švarus ir gaivus oras.
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