20x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 2 Pack Environmental Controllers The professional choice for growers

The professional choice for growers who require optimal light output

and also preventing unwanted odors or cross-contamination

professional pest control operations or in other mosquito and midge control operations to kill mosquito and midge larvae in small bodies of water

suitable for grow tents

make the PROfilters 45s and 70s ideal for residential filtration

20x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 2 Pack Environmental Controllers The professional choice for growersImportant 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 20x20x4 filter