20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 2 Pack Water Pumps & Irrigation Supplies • Automatic restart allows unit

• Automatic restart allows unit to be used with humidity controllers

• Metal bracket (so filter is stable on a flat surface or can be wall mounted)

The lightweight inline design makes it portable

Greenhouse Hobbyist

consider using Minute Pirate Bugs to gain control and A

20x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 2 Pack Water Pumps & Irrigation Supplies • Automatic restart allows unitImportant 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