From Cuisinart this 4-in-1 combo pack features: Contains 4-sided, folding combination H13 high-grade HEPA filter and active carbon filter Captures up to 99.9% of airborne particles 0.1 microns or larger including bacteria and various contaminants as well as unwanted cooking odors, smoke, VOCs, and more Minimum rating of 2,500 hours of run time Filters last up to 6 months while used 12 hours a day Filters last 3 months while running 24 hours a day Cuisinart Purxium™ filters purify up to 1000 sq. ft. twice every hour for always-fresh, odor free Approx. 12.2" w x 3.15" L x 13.39" H  Imported.