Dyson Purifier Humidify+Cool PH2 De-Nox/ 3-in-1: Purifies and humidifies your room air. Cools you³ in summer with a powerful airflow.Advanced air purification automatically captures 50% more NO₂.¹ Even destroys formaldehyde.⁶The Dyson PH2's Air Multiplier™ technology mixes and distributes purified, humidified air throughout the room.The efficient water management system and a 5-liter water tank allow the Dyson PH2 humidifier to provide up to 36 hours¹² of hygienic humidification 11 without the need for regular refilling.Changing the HEPA and potassium carbonate filters on the Dyson Purifier Humidity+Cool is quick and easy. A notification on the LCD display, coverage area: 30–40 m² weight: 8.2 kg, modes: Auto, Night, Breeze, Backward airflow, Deep clean