20" x 20" x 4" Media Air Filter

Size: 19-15/16" x 19-3/4" x 4-3/8" **Image may not represent correct model** New MERV 11 (at 492 FPM) performance with lower pressure drop at no additional cost. SpecificationsMeasurements: Height - 19-15/16", Length -19-3/4", Width - 4-3/8" Application: Replacement FilterEfficiency Standard: Efficiency ratings are based on American Society of Heating, Refrigerating and Air-Conditioning Engineers Standard 52.2-1999.Efficiency Standard: Efficiency ranges are defined for small particles, E1=0.3 to 1.0 microns; medium particles, E2=1.0 to 3.0 microns; and large particles, E3=3.0 to 10.0 microns.Fractional Efficiency: E1=25%, E2=62%, E3=85%Minimum Efficiency Reporting Value (Media Filters Only): MERV 11Static Pressure Drop (in. w.c.): 0.23 at 500 FPM Features Efficiency ratings are based on American Society of Heating, Refrigerating and Air-Conditioning Engineers Standard 52.2 1999. Efficiency ranges are defined for small particles, E1=0.3 to 1.0 microns; medium particles, E2=1.0 to 3.0 microns; and large particles, E3=3.0 to 10.0 microns.