Nominal: 20 x 20 x 4 size: 19 1/2"x19 1/2"x3 3/4" 20x20x4, ac furnace air filter replaces honeywell part numbers: f25, 203721, f35, f35r, fc35a1019, f100, f150, fc100a1011, f200, fc200e1011, f50a1124, f50a1165, f50e1026, f50e1182, f50e6124, f50e6165, f50e8021, f50e8062, f50f1107, f50f1040, f55a1244, f55a1426, f55a1459, f55f1029, f55f1052, f58a1050, f58f1026, f300e1027 comparable to 3m filtrete mpr 1500 to 1900 ultimate allergen defense comparable to honeywell allergen elite fpr 10 fights lint, dust mites, mold spores, pollen, pet dander, fine dust, smoke, viruses, and bacteria.
