Krachtig en meerlaags filter voor 3-voudige reiniging van lucht: filter voor grof stof, filter H13 en actieve koolfilterDo you know the way quiet a whisper is? Whispering creates a sound stress of approx. 30 dB(A). That is really louder than our Aerostyle products at the bottom placing. And frequently you wouldn’t sit right next to them.Os sintom