20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 14 Air Filters 1 Pack tents-/-indoor-greenhouses Flexible Installation – Options for

Flexible Installation – Options for suspended

What does Ferocious do

Especially the addition of potassium in the nutrient program

Not harmful to birds

the Mini is nothing but a powerhouse and is perfectly suited for small to medium size operations looking to streamline their process

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 14 Air Filters 1 Pack tents-/-indoor-greenhouses Flexible Installation – Options forImportant 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,