FLT4850PT Features: -Filter should be replaced approximately every 6-8 months depending on use.-True HEPA captures up to 99.97pct of airborne particles including dust mites, pet dander, mold spores, plant pollens and debris.-Filter has been treated with an anti-microbial agent to inhibit the growth of mold, mildew and odor-causing bacteria on the surface of the filter. Dimensions: -Overall Dimensions: 1.29" H x 4.76" W x 15.77" D.