20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack reflective-and-greenhouse-films 5 Year Warranty

5 Year Warranty

Operates with a high frequency

through eons of aging

4% (Mg) + micronutrients

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack reflective-and-greenhouse-films 5 Year WarrantyImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. We also carry 4 7 8 and 5 1 4 inch depth filters,