Amazon.com: Lennox X6673 20 x 25 x 5 Inch MERV 11 Efficient Air Filter Replacement for Healthy Climate HC11 Air Purifier Cleaner Purification Systems (3 Pack) : Home & Kitchen
Air Purete Furnace Filters 20x25x5 | Replacement for Lennox model: X6673 | Actual size : 19-3/4" x 24-3/4" x 4-3/8" | Pack of 1 Filter - Amazon.com
20x25x5 Air Filter MERV 9 (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Lennox X6673 - Walmart.com
Nordic Pure 20x25x5 4-3/8 Actual Depth Merv 12 Lennox X6673 Replacement AC Air 2 for sale online | eBay
Amazon.com: Lennox X6673 20 x 25 x 5 Inch MERV 11 Efficient Air Filter Replacement for Healthy Climate HC11 Air Purifier Cleaner Purification Systems (3 Pack) : Home & Kitchen
Lennox Replacement Filters (2 Pack) 20x25x5 Fits Part# X5426, X6661, X – Air Filter Hub LLC