20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 6 Pack air-purification Mitigate HAIs with patented UV-C

Mitigate HAIs with patented UV-C pathogen killing 99

or one zone analog and the other digital

and pollinators when applied as directed

It is also oil-free and therefore does not clog the stomata

Leafhoppers (Cicadellidae spp)

20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 6 Pack air-purification Mitigate HAIs with patented UV-CImportant 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. If you are replacing a 4 3 8 depth 20x20x4 filter