Krachtig en meerlaags filter voor 3-voudige reiniging van lucht: filter voor grof stof, filter H13 en actieve koolfilterDo you know how quiet a whisper is? Whispering produces a seem strain of approx. 30 dB(A). That is actually louder than our Aerostyle units at the lowest placing. And frequently you wouldn’t sit suitable close to them.Dust is a