20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 2 Pack hydro-systems Reduces humidity to desired level

Reduces humidity to desired level

Color: Black | Design: Exhaust | Dims

Beneficial nematodes destroy more than 230 different kinds of soil-dwelling and wood-boring insects

These tiny wasps parasitize leafminer larvae in the first and second stages of development

20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 2 Pack hydro-systems Reduces humidity to desired levelImportant 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 20x25x4 filter