4-stage H13 True HEPA Filtration: Effectively removes at least 99.95% of particles as small as 0.1 microns, including allergens, such as pollen, dust, pet dander, and smoke in rooms 300–550 square feet Antimicrobial HEPA treatment: Applied to the True HEPA filter inhibits the growth of odor and stain-causing microorganisms to extend the filter lifespan Monitors occupancy and air quality: the air purifier that works harder when you need it powered by EnviroSmart™ Technology See real time air quality data: PureView ™ Technology shows the percentage of particles captured and a live status of room air quality Wall Mount: Seamlessly integrates in your space creating whole-room circulation Built to Last: Designed and engineered for long term use backed with 5-year warranty