Krachtig en meerlaags filter voor 3-voudige reiniging van lucht: filter voor grof stof, filter H13 en actieve koolfilterDo you know how silent a whisper is? Whispering generates a seem stress of approx. thirty dB(A). That is in fact louder than our Aerostyle devices at the bottom location. And usually you wouldn’t sit ideal next to them.Air Purif