Purchased from Costco Works great. A new hepa filter would make this as fresh as new. From non smoking pet free home. <br><br> Featuring a 4-stage air purification system, this unit removes 99.99% of airborne particles as small as 0.003 microns in size. Winix’s PlasmaWave® Technology may help to reduce the presence of airborne pollutants, allergens, and impurities.  * 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 * Washable AOC 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