Dyson Purifier Cool PC2 De-NOx delivers whole-room purification and powerful cooling. Advanced air purification captures 50% more NO . Removes odors and gases, and continuously destroys formaldehyde. The fully sealed, 3-stage filter system captures 99.97% of particles as small as 0.3 microns. The whole purifier, not just the filtration system, is fully sealed to Hepa H13 grade. Air Multiplier technology projects over 76 gallons per second of smooth, yet powerful airflow. Connects to the MyDyson app to control and monitor air quality from anywhere, or hands-free with compatible voice services. Gas capture rates vary.Refers to non-living material. Particle challenge with Dehs oil specified in EN1822 within a chamber specified in Astm F3150. Tested per Iso 29463. Tested per Dyson internal test standards for whole-room air projection (Tm-005021) and purification coverage (Tm-003711). Requires 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. Fan, not air conditioning unit. Tested to Dtm-801, in fan mode, at speed 10. Tested to Dyson test method Tm-003387. In a 3 cubic meter test chamber, at fan speed 10, at third-party test laboratory (Fraunhofer Wki), comparison against regular activated carbon performance. Third party full machine testing based on Gb/T 18801-2022 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde Cadr is achieved. Results may vary in practice.