20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 2 Pack hydro-systems Color: Black | Design: Exhaust

Color: Black | Design: Exhaust | Dims

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up through 1/3 HP (10 max

has been naturally processed into a zero nitrogen and high phosphorus fertilizer that will aid in focusing the plant's energy on the production of flowers

20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 2 Pack hydro-systems Color: Black | Design: ExhaustImportant 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