Removes 99.95% of allergensPurify the air in the whole room thanks to the Dyson Hot+Cool Formaldehyde HP09 Smart Air Purifier. Featuring a HEPA and carbon filter, the HP09 filters 99.95% of potentially harmful particles, leaving the air free from dust, allergens or even formaldehyde particles. Get the air quality reportsThe HP09 automatically senses particles and gases in your room and creates air quality reports. See them in real time on the LCD screen.Great throughout the yearThe HP09 also doubles as a heater, so you'll stay nice and cosy through the winter. And you can use it to help cool the temperature down in the summer.