Winix A231 Tower H13 True HEPA 4-Stage Air Purifier, Perfect for Home office, Home classroom, Bedroom and Nursery, White and Charcoal Grey SmallFeaturing a 360 All-in-One 4-stage air purification system, this unit removes 99.97% of airborne particles as small as 0.3 microns in size. Winixs PlasmaWave Technology creates Hydroxyls which help reduce the presence of airborne Bacteria and Viruses. The units built-in Smart Sensors detect and monitor the quality of air in your environment and provides a visual representation of your current air quality. When in Auto Mode, the unit automatically adjusts fan speed to ensure efficient and cost-effective cleaning. Activate Sleep mode for quiet, energy-efficient operation.Room Size 230 Sq. Ft.: AHAM Verified room size of 230 sq. ft. Suitable for small to medium size living spacesWashable Fine Mesh Pre-Filter: The first line of defense against the largest airborne particles found indoorsActivated 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 lifeTrue HEPA Filter: Captures 99.97% of airborne allergens including pollen, mold spores, dust, pet dander, microbes, and smoke (particles as small as 0.3 microns in size)PlasmaWave Air Cleaning Technology: Acts as a permanent filter to safely break down odor, allergens, chemical vapors and other pollutants with no harmful ozoneProduct informationColorWhite/Charcoal GrayBrandWinixProduct Dimensions9.5D x 9.5W x 14.6HFloor Area230.0Specification MetAHAM CertifiedNoise Level36 dBItem Weight9 poundsManufacturerWinixCountry of OriginKorea, Republic ofItem model numberA231