The only air purifier that automatically responds to occupancy and air quality levels and then shows you when the air is cleanDelivers 3-5 air changes per hour (ACH) in 300-550 square feet shared spaces such as waiting rooms and restrooms. Quiet operationPatented EnviroSmart technology continuously monitors and automatically adjusts performance based on air quality and occupancyPureView screen shows real time air quality data, the percentage of particles captured and a live status of room air quality4-stage True HEPA filtration system removes 99.97% of all airborne contaminants, including virusesAntimicrobial HEPA treatment prevents bacteria growth on the filter and activated carbon filter reduces odors and VOCsCommercial grade floor stand air purifier with 5-year limited warranty