20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 15 Air Filters 4 Pack nutrient-combo Optional Upgrade to hardshell

Optional Upgrade to hardshell

RJ Port + Dimming knob

Onboard and cloud data logging at programmed intervals

grocery stores and shopping malls will be charging additional fees for plastic grocery bags -- to stave off environmental concerns -- so these bags will soon be a money saver

Great for light industrial use and oily parts handling

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 15 Air Filters 4 Pack nutrient-combo Optional Upgrade to hardshellImportant 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,