The Dyson HP1 Hot+Cool Air Purifier keeps you comfortable all year, with powerful heating in winter and cooling airflow in summer. It captures over 99-percent of tiny particles like dust and allergens with its HEPA-H13 filter and uses Air Multiplier technology to circulate purified air through the whole room. It automatically senses and reacts to air quality changes, then shows results on the display. Night mode runs quietly with a dimmed screen for light sleepers. You can control it with the MyDyson app or using your voice. With 350-degree oscillation and a diffused mode, it cleans the air without always blowing directly on you.