Dyson Purifier Humidify+Cool PH2 De-NOx Tower in White/GoldAdvanced air purification automatically captures 50% more NO . Purifies and hygienically humidifies the whole room. Also cools you. Dyson Purifier Humidify+Cool PH2 De NOx Hygienically removes 99. 9% of bacteria in the water. 14 Fully sealed, 3 stage HEPA H13 grade filtration captures 99. 97% of particles as small as 0. 3 microns. 2 Removes odors and gases2, and continuously destroys formaldehyde. Control and monitor air quality from anywhere using