Philips PureProtect 3200 Series Smart Air Purifier (Silver White)Big power in smaller sizeSmaller size, bigger cleaning speed (1), thanks to its innovative double fan design. With powerful filtration of 520 m3 h (CADR), it can easily handle large spaces of up to 135m2 (2) and can clean a room of 20m2 in less than 6 minutes (3). 3 layer HEPA filtration3 layer filtration made of pre filter, HEPA NanoProtect and Active Carbon captures 99. 97% of particles as small as 0. 003 microns (4) smaller than the smallest known