The Sharp KC-850U Triple Action Plasma cluster Air Purifier with Humidifying Function purifies a room up to 254 square feet. It offers a unique combination of air treatment technologies to make you more comfortable, whatever the season. Bacteria, germs, mold spores, pollen, pet dander, smoke, dust and odors can make breathing harder, especially for asthma and allergy sufferers. Sharp's Plasma cluster air purifier helps remove these irritants with an ultra quiet fan that draws air through a 3-stage filter system. This filter system plus the revolutionary Plasma cluster Ion Technology for air purifiers makes the air healthier and cleaner smelling. For an even more comfortable environment, sensors constantly monitor the air quality in your room, adjusting the fan for air purity while providing the optimum humidity level. This combination of features is a smart way to choose cleaner, healthier, more breathable air. SAFE: Sharp’s Plasma cluster Ion Air Purifier is not only ARB Certified. It produces 5X less ozone (at less than 0. 01 ppm) than the lowest industry and federal standards set by the FDA, OSHA and NIOSH. VERIFIED AROUND THE WORLD: Plasma cluster Ion Technology has been tested and confirmed in 17 tests by laboratories in the USA as well as in the U. K. , Germany, Japan, South Korea, China and Vietnam. BUILT-INTO OVER 80 MILLION PRODUCTS SINCE 2001: Sharp Plasma cluster Technology has been used in over 80 million products worldwide, including leading automakers, to reduce odors and refrigeration appliance manufacturers to help keep food refresher longer. PROVEN EFFECTIVE In reducing certain viruses including MS2 (Viral Stimulant) In reducing certain bacteria including E-Coli, Staphylococcus, epidermidis, and Serratia marcescens. In reducing in certain common molds and fungus, including Penicilillum and Aspergillus Niger; and most odors that conventional filters don’t reach. NATURALLY ADVANCED TECHNOLOGY FOR TRULY CLEAN AIR. Sharp’s exclusive patented Plasma cluster ion technology eliminates microscopic pollutants that traditional filters cannot trap-even those trapped in fabric, carpeting, and drapery! -by replicating nature’s own cleaning process of producing positive and negative ions from water vapor in the air. It is an ideal solution for allergy sufferers, asthmatics, pet owners, and smokers, and best used in a bedroom, living room, study, or exercise room. TRIPLE FILTRATION SYSTEM: washable pre-filter traps dust and other large airborne particles that passes through the filters. Activated carbon deodorizing filter removes odors that passes through the filters. TRUE HEPA filters effectively remove 99. 97% of particles from the air that passes through the filter from 0. 3 microns and larger. SMART SENSOR: in Auto Operation, fan speed is automatically controlled depending on amount of impurities in the air. The sensors detect impurities for efficient air purification. Each dust and odor indicator shows the quality of impurity to purity of air. LOWER OPERATING COST: long life TRUE HEPA filters typically require changing only every 2 to 5 years, so operating costs are low. (Actual filter life will differ depending on the environment). OTHER KEY FEATURES: Quick clean mode: releases high density plasma cluster ions; Switch the control light from bight to dim or off; and set the fan to low speed, at the quiet 26db for sound sleep. The KC850U features Max, Med, and Low fan speeds, plus Pollen, Quick Clean, and Auto Mode. In Auto Mode, the sensors will monitor your air quality and adjust the fan speeds automatically. The KC850U includes a humidifier that may make your home more comfortable. The Library Quiet® Low setting is perfect for the bedroom.