20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 2 Pack double-ended humidity and CO2 levels

humidity and CO2 levels

High Photon Efficacy – Achieves up to 2

a thriving root zone leads to a thriving plant

ready to use

When and where to use:

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 2 Pack double-ended humidity and CO2 levelsImportant 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,