Dyson Purifier Cool Formaldehyde TP09 purifying fan Our latest purifier detects and destroys formaldehyde, continuously. It combines a precise solid-state formaldehyde sensor with a unique catalytic filter that continuously destroys formaldehyde. HEPA H13 and activated carbon filters also capture dust, allergens, gases and other ultrafine pollutants. And Dyson purifiers have powerful Air Multiplier™ technology to purify the whole room. Key features: Diffused mode to purify without cooling you Diverts airflow through the back of the machine. To purify the room, without feeling the airflow or cooling you. Quiet even at full power Acoustically engineered to reduce turbulence, so it’s 20% quieter than the previous model. Perfect for night, or a peaceful working environment. Smart technology The MyDyson™ app lets you see which pollutants have been captured, set schedules and more. Control hands-free, using compatible voice services such as Amazon Alexa, Google Assistant or Siri. Easy maintenance Changing the filter is quick and easy. The machine’s LCD screen and MyDyson™ app notifies you when it needs to be replaced.