16x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack hand-tools and reliable 24/7 performance

and reliable 24/7 performance

Derived From: Botanical essential oils and plant-derived soap compounds

or up to 30°C (86°F) when surface mounted

This completely natural

so it is an extremely versatile workhorse of a machine

16x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack hand-tools and reliable 24/7 performanceImportant 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 16x20x4 filter