X6675 Furnace Filter 20 x 25 x 5 MERV16 Air Filter Replacement Compatible with Honeywell and Lennox Furnace, HVAC System and AC (1 Count - Actual Size: 19.53 x 24.6 x 4.65 Inches) - Amazon.com
Lennox X6675 Carbon Clean 20 x 25 x 5 Inch MERV 16 Efficient Air Filter Replacement for Healthy Climate Air Purifier Cleaner Purification Systems - Replacement Household Furnace Filters - Amazon.com