16x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 4 Pack harvest-solution Not for indoor use

Not for indoor use

One year warranty

but it can take a serious toll on your grow tent

Simply dilute with water

or a lighting controller

16x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 15 Air Filters 4 Pack harvest-solution Not for indoor useImportant 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,