Furnace Air Cleaner Filter Filter Type Pleated Performance Rating MERV 11 Actual Depth 5 1/4 in Actual Height 20 1/4 in Actual Width 20 3/4 in Compatible Manufacturer Model Number AMU2020 GMU 2020 YMU 2020 Number of Filters 2 Media Material Synthetic Filter Layer Type Electrostatic Nominal Depth 5 in Nominal Height 20 in Nominal Width 20 in Filters Down To 0.3 micron Filters Out Auto Emission Particulates Dust Filter Efficiency 65 Percent Air Flow @ 300 fpm 1 024 cfm