The only air purifier that automatically responds to occupancy and air quality levelsDelivers 3-5 air changes per hour (ACH) in 650-1100 square feet shared spaces such as classrooms and conference rooms. Quiet operationPatented EnviroSmart technology continuously monitors occupancy and room air quality and automatically adjusts to clean the air4-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 wall mount air purifier with 5-year limited warranty