The Dyson Purifier Cool purifying fan™ combines intelligent sensing with an advanced, fully sealed filtration system.? It’s engineered with two phases of purification so what goes inside stays inside. The HEPA filter? captures 99.97% of particles 0.3 microns? in size, and powerful Air Multiplier™ technology purifies the whole room¹ and cools you.² ¹Tested per Dyson internal test standards for whole-room air projection (TM-005021) and purification coverage (TM-003711). ²Fan, not an air conditioning unit. ³Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above). Standard data and messaging rates may apply. Refer to the MyDyson™ app for compatible voice services. ?Particle challenge by DEHS oil specified in EN1822 within a chamber specified in ASTM F3150. ?Tested per ISO 29463