Dyson Purifier Cool Formaldehyde 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.2 HEPA H13 and activated carbon filters also capture dust, allergens, gases4 and other ultrafine pollutants. And Dyson purifiers have powerful Air Multiplier™ technology to purify the whole room.1