Air Bear 20x25x5 (4 7/8) Replacement 259112-102 Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack pumps-&-irrigation Four square obeservation windows on

Four square obeservation windows on the front & back door

automatic temperature compensation (ATC) with adjustable

Green LED identification lights inform you of the unit's status at all times

Many PK boosters add far too much of these elements and create a cascade of problems

Air Bear 20x25x5 (4 7/8) Replacement 259112-102 Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack pumps-&-irrigation Four square obeservation windows onImportant 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 3 8 and 5 1 4 inch depth filters,