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Media replacement cartridge, for furnaces with filter cavities approximately sized 20 inches x 20 inches x 4 inches.
Actual measurements of filter: 19.5 inches by 19.5 inches by 3.75 inches.
Filter may be smaller than cavity to account for installation differences, but the size will not reduce the filter's effectiveness.
MERV 11 rating.
Original part number; SC60-20X20X4, HW2020, HW20x20, M820204, 80055.042020.