Replacement filter, 21 x 27 x 5 inch (530mm x 670mm x 120mm). High-efficiency, long-life filter for Perfect Fit media air cleaners captures significant amount of airborne particles in air circulating through filter. Higher efficiency and lower pressure drop than Original Equipment Maker (OEM) filter captures particles as small as 0.3 microns. Pleated filter for greater media capacity. Low pressure drop reduces strain on equipment, provides comfortable air flow, and helps maintain equipment efficiency. Easy installation; angled edge fits neatly into offset side of air cleaner frame. Use with Trane Perfect Fit media air cleaners. Efficiency rating based on American Society of Heating, Refrigerating and Air-Conditioning Engineers Standard 52.2-1999. Efficiency ranges defined for small particles, E1=0.3 to 1.0 microns; medium particles, E2=1.0 to 3.0 microns; and large particles. Fractional efficiency: E1=22%, E2=61%, E3=87%. Minimum Efficiency Reporting Value (MERV)-10 (media filters only). Static pressure drop (inch/ water column/wc) 0.17 inch at 500 Foot Per Meter (FPM). Underwriters Laboratories Inc. (UL)-approved. Filter element: UL Listed, UL900, Class 2.