20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 2 Pack fans-ventilation-ducting Grow Big Hydroponic

Grow Big Hydroponic

These clay pebbles have been fired in super-heated kilns causing them to expand and become extremely porous

warehousing

The Centurion QuanTanium wet tumbler allows the operator to process material when it's wet rather than Dry

built-in hanging brackets to help with fitment and installation

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 2 Pack fans-ventilation-ducting Grow Big HydroponicImportant 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,