16x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack MH this model features zippered openings

this model features zippered openings which allow you to completely close off each dry rack level

Many plants and microbes prefer mildly acidic soil

Automatic single calibration with calibration indicator

along with the routine dust

organic British Columbia kelp (Macrocystis integrifolia)

16x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 15 Plus Carbon 4 Pack MH this model features zippered openingsImportant 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,