Fellowes AeraMax Pro HEPA Air Purifiers removes 99.97% of all airborne contaminants, including . It automatically responds to occupancy and air quality levels and then shows you when the air is clean. Delivers 3-5 air changes per hour in 600-1100 square feet shared spaces such as classrooms and conference rooms. Patented EnviroSmart™ technology continuously monitors and automatically adjusts performance based on air quality and occupancy. PureView screen shows real time air quality data, the percentage of particles captured and a live status of room air quality. HEPA filter with treatment removes the source of allergens and irritants by capturing most airborne , , and pollen. Low decibel level ensures the air purifiers's operation does not disrupt your daily workflow. Portable design can move from room to room with ease. Backed by the manufacturer's 5-year limited warranty.