GermGuardian HEPA Air Purifier for Home, Large Room Air Purifiers with HEPA Filters, Removes 99.97% Pollutants, UV C, AC4825E, GrayROOM COVERAGE: This GermGuardian air purifier circulates air 1x hour in spaces up to 743 sq ft and 4. 8x hour in rooms approximately 153 sq ft, making it a top performing air purifier for home large room and air purifier for bedroom that is also Ozone Certified. ADVANCED FILTERING: With the true HEPA filter, this air purifier traps 99. 97% of harmful germs, dust, pollen, and allergens such as pet dander and mold spores, serving as one of the best air