20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 8 Pleated Plus Carbon 4 Pack spl_hi * High-quality

* High-quality

and irrigation heads

Repeat small application process and stir well

adjustable mixing time

the RAY44's 120-degree beam angle concentrates photons directly on the canopy

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 8 Pleated Plus Carbon 4 Pack spl_hi * High-qualityImportant 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,