20x25x5 (4 3/8) Lennox X6673_X6675 Replacement  MERV 8 Pleated Plus Carbon 4 Pack spl_hi It uses no pulleys

It uses no pulleys

the 900e is a great fit for use in vertical racks

the SUNMASTER line has been built on the marvelous versatility and flexibility of metal halide technology

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 It uses no pulleysImportant 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,