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Lennox X0586 (2-Pack) - 20" x 25" x 5" MERV 11 BMAC Furnace Filter | eBay
Filterbuy 20x25x5 Air Filter MERV 11 Allergen Defense (2-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
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Honeywell Home 20 x 25 x 5 Pleated Furnace Air Filter FPR 8, MERV 10 CF508D2025 - The Home Depot