20x25x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack grow-system/-trays/-reservoirs Can be added to nearly

Can be added to nearly any Integrated Pest Management (IPM) program

Use the included mounting bar to place it on any open wall space or install caster wheels to set it on the floor

seedling establishment

Three dual ball-bearing exhaust fans with PWM motors quietly expel heat (at a maximum 33

20x25x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack grow-system/-trays/-reservoirs Can be added to nearlyImportant 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