20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 4 Pack Environmental Controllers You can't beat the submersible

You can't beat the submersible line

or any other type of growing media

Output Voltage:                          100~240 VAC

• Limit fertilizer runoff and overuse

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 4 Pack Environmental Controllers You can't beat the submersibleImportant 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,