The Dyson Purifier Cool PC1 delivers whole-room purification* and powerful cooling.** The fully sealed filter system captures 99.97% of microscopic allergens† and pollutants as small as 0.3 microns.†† The whole purifier, not just the filtration system, is fully sealed to HEPA H13 grade¶ so what goes inside, stays inside. Air Multiplier™ technology projects over 76 gallons per second of smooth-yet-powerful airflow.¶¶ Connect to the MyDyson™ app to control and monitor air quality from anywhere, or go hands-free with compatible voice services.§