Repl. Lennox 20x25x5 MERV-8 Furnace HVAC Filters, Part X6673 (3PK)
Filterbuy 20x25x5 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters for Honeywell FC100A1037, Lennox X6673, Carrier, and More (Actual Size: 19.88 x 24.75 x 4.38 Inches) - Amazon.com
Lennox x6673 MERV 11 Healthy Climate Box Filter - 20x25x5", Pack of 1 for sale online | eBay
AIRx Filters 20x25x5 MERV 8 HVAC AC Furnace Air Filter Replacement for Lennox HCF20-10 X0586 X6673, Dust 2-Pack, Made in the USA - Amazon.com
X6673 - Lennox X6673 - Merv 11 Media Filter 20" x 25" x 5"
Filters Fast FF20255X6673M8 Replacement for Lennox X6673 MERV8, 20x25x5 - 2-Pack
Atomic X6673 MERV 11 Lennox Compatible Air Cleaner Filter Media for HC - Atomic Filters
Nordic Pure 20 in. x 25 in. x 5 in. Honeywell/Lennox Replacement Furnace Air Filter MERV 10 (2-Pack) 20x25x5HM10-2 - The Home Depot