20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 1 Pack pots-and-containers • Battery life 300 hours

• Battery life 300 hours of use

spray every 3-5 days

NOTE: Setup of the multi-bucket Root Spa system is the same as that of the single-bucket system

It is suitable for indoor or outdoor domestic use (in pots or in automated systems) and for intensive soil-less cultivation in greenhouses

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 1 Pack pots-and-containers • Battery life 300 hoursImportant 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,