Obliterating the competition as well as the nasties in the air, the Dyson Purifier Humidify+Cool incorporates a solid-state formaldehyde sensor and unique catalytic filter to detect and continuously destroy formaldehyde¹ and a HEPA filter that captures 99.97% of particles 0.3 microns in size — and everything that gets sucked inside, stays there. Air Multiplier technology projects clean air, with further features including three fan modes, night mode and voice control.