You are buying a new Winix D480 True-HEPA Air Cleaner combines the best Air Cleaning technologies to capture all of the unseen particles and impurities suspended in the air; including dust, pollen, pet dander, smoke, organic chemicals (VOCs) and household odors. The D480 is our largest and most powerful air cleaner in the series and is designed for optimal use in large rooms. It features a 3-Stage Air Cleaning System that starts with a Fine Mesh Pre-Filter that removes large particles such as hair, pollen and lint. Next, an Activated Carbon Filter absorbs odors and household VOCs. Lastly, a True HEPA Filter which captures 99.97% of unseen particles down to 0.3 microns such as pet dander, smoke, and dust. The Auto Mode and Smart Sensor combine to deliver Set-and-Forget convenience. The control panel features 4 Fan Speeds for absolute control and a Sleep Mode which dim the lights and sets the fan speed to quiet for an undisturbed sleep. The Winix D480 is ENERGY STAR Certified and AHAM Verified(R) for 480 sq. ft. rooms. You Care for Home Cleaning, We Care for Your Air. True-HEPA filtration captures 99.97% of particles (0.3 microns and larger) Activated carbon filter is formulated to capture offensive smoke, cooking, and other household odors; the disposable carbon sheet also works as a filter to capture large particles like hair, carpet fibers and dust Washable pre-filter extends the life of your filter by capturing pet hair and larger airborne particles