Dyson's most advanced filtration system combines a precise, solid-state formaldehyde sensor with a unique catalytic filter that continuously destroys formaldehyde.¹ And Dyson purifiers have powerful Air Multiplier™ technology to purify the whole room.² ¹Third party full machine testing based on GB/T 18801-2018 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved. Results may vary in practice. ²Tested per Dyson internal test standards for whole-room air projection (TM-005021) and purification coverage (TM-003711). 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.