Dyson TP7A Cool Air Purifier with HEPA Filter White/Nickel Automatically senses, captures, and traps pollutants for cleaner air Dyson's latest purifiers combine intelligent sensing with an advanced filtration system. A filter removes gases and odors and a HEPA filter captures 99.97% of particles 0.3 microns in size. And Dyson purifiers have powerful Air Multiplier technology to purify the whole room. Senses and reports automatically Integrated sensors constantly analyze your air, while our unique algorithm cross-checks data every second. It diagnoses pollutants at a molecular level, displaying live results on the LCD. Captures gases and ultrafine particles The HEPA filter captures 99.97% of particles 0.3 microns in size. An additional filter removes odors and gases including VOCs. Purifies the whole room Only Dyson purifiers have Air Multiplier technology. It generates the circulation power to draw even distant pollutants into the machine, projecting purified air throughout the room. Fully sealed to HEPA H13 In our latest purifiers, it's not just the filter that meets HEPA H13 standard, it's the whole machines. So what goes inside, stays inside.