†AHAM Verifide® at 360 sq ft.: Also cleans rooms up to 1,740 sq ft in 1 hour (870 sq ft in 30 minutes, 580 sq ft in 20 minutes, 435 sq ft in 15 minutes Washable Fine Mesh Pre-Filter: The first line of defense against the largest airborne particles found indoors Activated Carbon Filter: Reduces VOCs and household odors from cooking, pets, and smoke. It is designed to catch airborne particles found indoors, which also helps prolong the True HEPA Filter life True HEPA Filter: Winix True HEPA captures 99.99%* of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.003 microns PlasmaWave® Air Cleaning Technology: May help to reduce the presence of airborne impurities Air Quality Indicator: Visual indicator displays real-time air quality in the room with LED lights Smart Sensors + Auto Mode: Built-in air quality sensor measures and adjusts fan speed in real-time Ultra-Quiet: Nearly silent on slowest speed (27 dB) Light Automated Sleep Mode: Unit automatically activates its quiet, energy-efficient Sleep Mode when room is darkened and returns to Auto Mode in the presence of light Tested and Trusted: This unit is proven dependable and efficient by being AHAM Verifide®, Energy Star Certified, and UL Certified Energy Efficient: Energy Star Certified for low energy consumption, resulting in reduced operating costs Filter Replacement Indicator: When the filters need to be replaced, the Filter Replacement Indicator LED will illuminate Convenient Remote Control: Manage the unit’s power and settings from anywhere in the room *Based on independent laboratory tests conducted on inanimate particles as small as 0.003 microns in size. †AHAM Verifide® 4.8 Air Changes per hour are based on testing of Tobacco Smoke removal in rooms with 8-foot-high ceilings. Air Quality improvements can vary based on many factors including the actual size, contents, type and level of pollutants present, and air flow profile of the room.