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AAF AAF Flanders Nested FiberGlass MERV 1 Air Filter, size 20" x 20" x 1" (4 Filters), - Walmart.com
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K&N 14-in W x 25-in L x 1-in Washable MERV 11 Pleated Air Filter in the Air Filters department at Lowes.com
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Amazon Basics Merv 11 AC Furnace Air Filter - 14'' x 14'' x 1'', 6-Pack: Amazon.com: Tools & Home Improvement
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Filtrete 16x20x1 Air Filter, MPR 1000, MERV 11, Micro Allergen Defense 3-Month Pleated 1-Inch Air Filters, 2 Filters - Replacement Furnace Filters - Amazon.com
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Filtrete 14-in W x 25-in L x 1-in MERV 5 Basic Pleated Air Filter (3-Pack) in the Air Filters department at Lowes.com
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Filtrete 17.5-in W x 29.5-in L x 1-in MERV 5 Basic Pleated Air Filter in the Air Filters department at Lowes.com
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