Lennox X6669 Furnace Filter 21x26x4 Healthy Climate MERV 16 for Model HCFPCO20-16, 21" x 26" x 4." Package of 2 16x25x5 Lennox PMAC20

Lennox PMAC20

Unique design offers an additional 1" of filtration depth compared to standard cartridge replacement filters

Must Have The Original Aprilaire 2400 Reusable Plastic Cartridge / Frame As Shown in Picture to Use This Box Filter

Failure to do so could result in serious injury from electrical shock and voids warranty due to possible product misapplication

Lennox X6669 Furnace Filter 21x26x4 Healthy Climate MERV 16 for Model HCFPCO20-16, 21" x 26" x 4." Package of 2 16x25x5 Lennox PMAC20Lennox Healthy Climate X6669, Model HCFPCO20 16 21" x 26" x 4," for Air Cleaner Model PCO 20C Also Replaces X6667 Filter (HCFPCO20 11) MERV 16 Rated Actual Size 21 1 4" x 26" x 4" Package of 2