Media Air Filter, 20" x 25"

Media Air Filter, 20X25". Minimum Efficiency Reporting Value Merv-10 At 492 Feet Per Minute (Fmm) Performance with Lower Pressure Drop At No Additional Cost. 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, Over 3. 0 Microns. Fractional Efficiency: E1=25%, E2=62%, E3=85%