20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 8 Air Filters 1 Pack grow-systems-trays-reservoirs Supported by a rear hinge

Supported by a rear hinge

Great back up filter for controlled

the duct fan uses a mixed flow design using a stator blade and dual hydrodynamic wind circles

• Cool operation allows closer placement to plants

you'll end up with more of your original biomass in your bags and consistent eye-pleasing buds

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 8 Air Filters 1 Pack grow-systems-trays-reservoirs Supported by a rear hingeImportant 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,