For amazingly powerful air purification, there’s the Blueair 603. From its powerful fan engine to its SurroundAir filtration technology, this Blueair is the most powerful Blueair ever. Best for very large rooms up to 60m2 or 640ft2, this powerhouse delivers dramatic improvements in efficiency, earning the Blueair 603 even better Clean Air Delivery Rates than the Blueair 603. Plus you can easily move the Blueair 603 around your living space thanks to convenient caster wheels on the bottom of the unit Design The union of visually pleasing form and effective function is a hallmark of Swedish design, and Blueair is no exception. The Blueair 603 is designed for maximum performance in large rooms. Available in white or dark grey, it suits your distinct style of living. Convenient caster wheels let you easily move your Blueair from room to room. • Ideal for very large rooms(640ft2 or 60m2) • 99.97% filtration efficiency • Energy Star® qualified Technology Blueair's patented SmokeStop™ filters of polypropylene with 5.3 lbs. of activated coconut shell carbon impregnated with an equal blend of Potassium Iodide (KI), Phosphoric acid (H3PO4), and Potassium Hydroxide (KOH). Recommended for smoke, gases, odors, chemicals, and general indoor air pollution control including pollen grains, house dust mites, mold spores, and pet dander.