20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 13 Plus Carbon 2 Pack Cleaning Products Initial Par: 1900 umol/s

Initial Par: 1900 umol/s

plant-safe chemical with powerful oxidative properties to keep your root zone clean and free of unwanted organisms and buildup

8' RO and drain line

• Uniform in analysis every drop contains the same analysis

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 13 Plus Carbon 2 Pack Cleaning Products Initial Par: 1900 umol/sImportant 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,