Alexapure 3049 Breeze Energy-Efficient True HEPA + IonCluster Air Purification System &ndash; White Removes up to 99.97% of Airborne Contaminants;Intelligent air quality sensor and indicators Patented IonCluster technology removes airborne particles throughout room, with no ozone byproduct Pre-filter, carbon, and true HEPA filters remove particles as small as 0.3 microns Covers up to 800 square feet. Energy Efficient - cycles 120ft2 every 12 minutes, air change per hour (ACH) exceeds Allergy and Asthma foundation recommendations CADR: 315 m3/h