20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 14 Plus Carbon 2 Pack BVV producing up to 106 CFM

producing up to 106 CFM and 28 dBA in noise

The only "Solution Grade" Bloom" guano powder available

and cannot run double-ended (DE) lamps

When treating plants outside wait for still air

reducing the need for harsh

20x20x5 (4 3/8) Honeywell/Lennox Replacement Furnace Filters MERV 14 Plus Carbon 2 Pack BVV producing up to 106 CFMImportant 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,