The Honeywell AirGenius 3 Air Cleaner/Odor Reducer combines the best features and technology into one really smart air cleaner. The patented ifD filter is extremely quiet and effective at capturing up to 99.9 percent of airborne particles, both the larger visible particles and the microscopic invisible ones from the air that passes through the filter, 0.3 microns and larger. The ifD filter is permanent and easy to clean – simply wash the filters 4 times per year – no replacement filters needed! How the air purifier works: a fan continuously draws in airborne pollutants. The dirty air passes through the pre-filter where the larger particles are captured. If desired, you have the option of using the “k” pre-filter will also absorb odors, gases and VOCs (volatile organic compounds). The air then passes through the ifD filter that attracts dust and allergens like a magnet. The filtered, cleaner and fresher smelling air is then circulated back into the room. The AirGenius 3 has an oscillation option that will quickly disperse the cleaner air throughout the room. To ensure stated product performance, use only Genuine Honeywell Replacement Filters. Color: White.