20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 10 Air Filters 4 Pack commercial-greenhouse-fixtures Frosted lens to properly blend

Frosted lens to properly blend spectrum

700 m3/h (36900 cfm) at 25 Pascal (0

Mechanical killing action-pests build no genetic resistance

Worried you’re not prepared

Auto resume dosing on restart after power loss

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 10 Air Filters 4 Pack commercial-greenhouse-fixtures Frosted lens to properly blendImportant 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,