16x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack new_additions Used in conjunction ducting for

Used in conjunction ducting for various air circulation and ventilation projects including hydroponic grow rooms and tents

By using a bottom flood on the first wash

(x2) AirThread Tension Tumbler

or buying components to achieve NEMA 4X rating

16x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack new_additions Used in conjunction ducting forImportant 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. We also carry 4 7 8 and 5 1 4 inch depth filters,