20x25x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 1 Pack Trimmers The PDU features an 1800-joule

The PDU features an 1800-joule surge suppression rating to absorb energy spikes caused by electrical power grid and overload issues

• Improved fabric & zippers—thicker with the best zippers on the market

Nordic Pure 18x24x1 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

Ideal For Growers Who:

or stove top

20x25x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 1 Pack Trimmers The PDU features an 1800-jouleImportant 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