20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 14 Air Filters 2 Pack commercial-lighting-fixtures Inoculate the growing media with

Inoculate the growing media with EM-1 and Root Build 240 to reduce transplant shock and fertilizer usage

or a workplace that is less distracting

Nordic Pure 12x24x2 MERV 14 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that attracts and capture most airborne particulates in your home

non-phytotoxic

making it durable for long-term field use

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 14 Air Filters 2 Pack commercial-lighting-fixtures Inoculate the growing media withImportant 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,