20x25x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack spl_cg In contrast to phosphate

In contrast to phosphate

high flow rates and high pressure is needed

The socket assembly and 15' lamp cord are built-in and it comes complete with a hinged frame

water purification applications

Repeat watering several times until water drains from the bottom of the container

20x25x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack spl_cg In contrast to phosphateImportant 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