The OEM AeraMax Air Purifier w/ Sensor effectively purifies air in small rooms up to 290 square feet. The AeraSmart Sensor monitors air quality and automatically adjusts the fan speed to maintain optimal purification. It features a True HEPA filter with AeraSafe antimicrobial treatment, which safely removes 99.97% of airborne particles as small as 0.3 microns. This air purifier is extremely effective at capturing influenza virus from indoor air, while the carbon filter removes odors and captures large airborne particulates.