The Blue Pure 411+ air purifier offers high performance, simple one-button operation, and customizable colors - all in a lightweight, compact package. The air purifier creates a comfortable environment with a 360° air intake to completely filter room air about every 12.5 minutes or about 4.8x an hour in small rooms up to 185 ft². The 3-step combination particle + carbon filter removes annoying household odors, as well as 99.97% of airborne particles, like pollen, dust, pet dander, and more with Blueair's HEPASilent™ filtration technology. The Blue Pure 411+ is rated by ENERGY STAR for energy efficiency and awarded the Quiet Mark for impressively quiet operation. Easily adapt the Blue Pure 411+ to your space with multiple pre-filter color options, machine-washable pre-filter in Dark Shadow is included. Or, for a Scandinavian look, go without a pre-filter altogether to show off the sleek, white-mesh frame. At Blueair, our Swedish heritage inspires sustainability and quality at the heart of everything we do. All Blueair purifiers are AHAM Verifide® for Clean Air Delivery Rate (CADR) and given a recommended room size, ENERGY STAR certified, and tested by the California EPA Air Resources Board (CARB) for safe ozone emissions.