Dyson's most advanced filtration system combines a precise, solid-state formaldehyde sensor with a catalytic filter that continuously destroys formaldehyde.What it does: Three phases of purification sit within a fully sealed filtration and airflow system. A solid-state formaldehyde sensor and a unique catalytic filter detect and continuously destroy formaldehyde, while powerful Air Multiplier™ technology purifies, heats the whole room and cools you.Features and benefits:- Detects and destroys fo