Winix C909 4-Stage Air Purifier with Wi-Fi & PlasmaWave TechnologyAHAM Verifide at 500 sq ft.: Also cleans rooms up to 2,420 sq ft in 1 hour (1,210 sq ft in 30 minutes, 807 sq ft in 20 minutes, 605 sq ft in 15 minutes) The Smarter Air Purifier: Control and monitor your unit anytime from anywhere by instantly accessing your unit with the Winix Smart App through the convenient WiFi feature Washable Fine Mesh Pre Filter: The first line of defense against the largest airborne particles found indoors Activated Carbon