16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 2 Pack additives in an indoor grow

in an indoor grow

on/off cycle

Your cuttings will benefit from a clean blade surface that reduces the risk of infection and shock

Controller includes a single (or dual) Digital Integrated Sensor Module (DISM)

Russet Mites (Eriophyoidea superfamily)

16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 2 Pack additives in an indoor growImportant 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,