20x20x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 6 Pack hydro-x (4) 100’ pre-wired environmental sensors

(4) 100’ pre-wired environmental sensors monitoring temperature

This will ensure that you meet the minimum pressure requirements

Ultra high capacity instant dechlorinator

Outstanding results controlling powdery mildew

1 Phase) are built to last

20x20x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 6 Pack hydro-x (4) 100’ pre-wired environmental sensorsImportant 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. If you are replacing a 4 3 8 depth 20x20x4 filter