The Dyson HP00 Pure Hot+Cool Purifying Fan Heater White/Silver 385276-01 removes gases and 99.95% of allergens and pollutants from the air. (1) Captures ultrafine particles from the air including pollen bacteria and pet dander right down to 0.1 microns. Captures gases odours and domestic fumes. A dense layer of tris-impregnetad carbon crystals capture odours and gases. With Air Multiplier technology and oscillation it sweeps the room with a long-range stream of purified air. Purifying heater in winter. Purifying fan in summer. Jet Focus control. Focused mode for personal heating diffused mode for room heating. Disclaimer: (1) Particles as small as 0.1 microns. Tested to EN1822. Gaseous capture tested to GB/T18801. Gaseous capture rate may vary.