OVERVIEW: Dyson Purifier Hot+Cool HP1 heats or cools you with HEPA H13 purified air Automatically senses, captures and traps pollutants. For you and your family to breathe cleaner air and live in a healthier environment. Heats the whole room evenly or cools you. Fast. Captures 99.97% of particles as small as 0.3 microns – to purify your whole room evenly. Control and monitor air quality from anywhere using the MyDyson™ app.