20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack Lighting & Electrical Components Mother Nature has been evolving

Mother Nature has been evolving and perfecting her growing methods for over 450 million years

Breaks down scale - Keeps irrigation systems in pristine condition

Too high or too low

Trim Fast also protects your cutting equipment from corrosion while not in use

The SPH-1 can be located in a central location with a single RJ12 cable connecting it to the main controller

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack Lighting & Electrical Components Mother Nature has been evolvingImportant 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,