Dyson Purifier Hot+Cool HP1 delivers whole-room heating and powerful cooling with purified air. The fully sealed filter system captures 99.97% of microscopic allergens² and pollutants 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. Tested per Iso 29463. Gas capture rates may vary.²Refers to non-living material. Particle challenge with Dehs oil specified in EN1822 within a chamber specified in Astm F3150. Tested In maximum setting for air projection, tested in Auto mode for purification coverage, tested for room heating per relevant Dyson method DTM961. Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above).