Kenmore 83394 Small Room HEPA Filter Air Purifier This Kenmore Small Room HEPA Filter Air Purifier is independently lab tested and verified by AHAM to reduce smoke, dust and pollen particles from the air in rooms up to 317 square feet and features a 105 AHAM Verified Smoke CADR rating. HEPA filtration captures 99.97 percent of particles as small as 0.3 microns from air passing through the filter and helps eliminate allergens and pollutants like pollen, pet dander and dust. A separate charcoal pre-filter traps odors and cleans the air. At only 29db on low speed, the unit is extremely quiet. Filter change lights indicate when it's time to change either filter, keeping the air clean and the unit running like new. Electronic soft touch controls are easy-to-use. You can position the unit horizontally or vertically to fit in tight spaces. ENERGY STAR rated. Use the ionizer feature (optional) for another stage in air filtration. An optional ionizer is the third cleaning stage that assists in particle removal and freshens the air. Dimensions: 12.12"W x 7.4"D x 14.4"H