20x25x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filter 1 Pack soil Its Heat Blast function rapidly

Its Heat Blast function rapidly raises the room temperature

Extension Kit: 8’11”

NemAttack Beneficial Nematodes

The SPH-1 comes complete with the SPH-1 hub

T4's Type Feed lbs/hr

20x25x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filter 1 Pack soil Its Heat Blast function rapidlyImportant 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