Lennox X6664 Furnace Filter Super Low Price Free Shipping

Find great pricing on Original Lennox and compatible Lennox filters at Atomic Filters.

Lennox X6664 Furnace Filter (formerly part 75X74) is the correct Replacement for PCO-12C. The nominal filter size is 17 x 26 x 4 with an actual size of 16-1/2" x 25-7/8" x 3-15/16. The MERV 16 upgrade replacement filter is X6666.

Shop Lennox Merv 16 Filter

Lennox X6666 17x26x4 (16-5/8 x 26x 4) OEM MERV 16 Replacement Furnace Filter- 1 pack