• X6672 16x25x5 MERV 16 Furnace Air Filter Compatible with Lennox X6672 Healthy Climate Carbon for Furnace HVAC System (Actual Size: 15.75 x 24.75 x 4.37 In), Part Number HCF16-16, 2 Pack KWD 34
• X6675 Merv 16 Air Filter 20x25x5 Carbon Efficient Air Filter Compatible with Lennox X6675 and Lennox HCC20-28 Furnace HVAC System(Actual Size: 19.8 x 24.8 x 4.3 In), Part Number HCF20-16, 2 Pack KWD 36.500