Krachtig en meerlaags filter voor 3-voudige reiniging van lucht: filter voor grof stof, filter H13 en actieve koolfilterDo you know how tranquil a whisper is? Whispering provides a seem force of approx. thirty dB(A). That is really louder than our Aerostyle units at the bottom placing. And frequently you wouldn’t sit proper close to them.Activa R