20x25x5 (4 3/8) Lennox X6673_X6675 Replacement Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 4 Pack spl_magfan The RS family of inline

The RS family of inline exhaust fans provide the power and flexibility needed for residential and commercial applications

efficient photosynthesis and rapid transportation of carbohydrates and starches throughout a plants vascular system

so you can get the most out of your product

Resistant to chlorinated water

but is also systemically as it is absorbed into the plant

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 4 Pack spl_magfan The RS family of inlineImportant 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,