20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 1 Pack eligible-for-discount Double-ended system delivers higher PAR

Double-ended system delivers higher PAR value with excellent uniformity

and established crops at first sign of slug activity or as a preventative in early spring

Plants grown under 600W FULL NOVA appear healthier and support more flowering in an earlier period of time

soil or coco

They avoid parasitized nymphs making them ideal for use with Encarsia formosa and/or Eretmocerus eremicus

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 1 Pack eligible-for-discount Double-ended system delivers higher PARImportant 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,