Automatically purifies a whole room properly, capturing 99.95% of harmful pollutants as small as 0.1 microns. To simultaneously purify a whole room properly, the Dyson Purifier Cool air purifier goes beyond standard tests by automatically sensing pollution, capturing ultrafine pollutants, and projecting purified air using Air Multiplier technology. Automatically detects airborne particles and gases, then diagnoses and reports them in real time. Activated carbon filters remove gases. Sealed HEPA filters capture 99.95% of ultrafine particles such as allergens and pollutants. The new Dyson air purifiers have Air Multiplier technology and 350° oscillation, to project air around the whole room. The only air purifier fully sealed to HEPA 13 standard. So what goes inside, stays inside.