20x25x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filter 1 Pack soil Extension Kit: 8’11”

Extension Kit: 8’11”

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

Fully enclosed using heavy-duty 2mm cold-rolled steel with chamfered edges for rounded corners

HPS with CMH

20x25x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filter 1 Pack soil Extension Kit: 8’11”Important 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