Blueair 450E Air PurifierOverview Innovated with love in Sweden, the Blueair 450E gives you silently and effectively clean indoor air in rooms to 370 square feet, using powerful HEPASilent technology with remote control and instant digital access to particle and gas levels, speed settings, and filter change status. Key Features Warranty: 5 years Designed for mid sized rooms up to 34 sq. m or 370 sq. ft. in size. Patented HEPASilent filtration technology. Certified 99. 97%