20x25x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack drying-racks We recommend that you change

We recommend that you change your air filter every 3-6 months to maintain maximum efficiency and economy

Our new way to knock out an infestation is spray two days in a row to kill all adult and nymph mite’s which will end the feeding frenzy

Shipping Weight (unit): 1

On-screen tutorial messages for calibration

20x25x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 2 Pack drying-racks We recommend that you changeImportant 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 20x25x4 filter