Dyson HushJet compact purifier is Dyson's most powerful, small-format purifier. Basing their design on that of jet engines, Dyson engineers developed HushJet air projection, which minimizes noise while purifying rooms of up to 203 sq ft. So, it’s compact in size yet powerfully circulates air throughout the entire room. Whether you’re working, relaxing or sleeping, the Dyson HushJet Purifier Compact is designed to perform in the background, quietly protecting your home from indoor pollutants that can build up quickly in enclosed, well-sealed places.