20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack HPS Working Environment: Temperature 32-122°F

Working Environment:            Temperature 32-122°F

Nordic Pure 16x20x4 Pleated Air Filters MERV 13 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home

reduces vibration while ensuring smoother airflow

The Daystar uses the highest purity and efficiency European aluminum and was designed by the finest reflector engineers in the country

20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack HPS Working Environment: Temperature 32-122°FImportant 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