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Filterbuy 18x18x1 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 17.50 x 17.50 x 0.75 Inches) - Replacement Furnace Filters - Amazon.com
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Filtrete 18-in W x 18-in L x 1-in MERV 5 Basic Pleated Air Filter (3-Pack) in the Air Filters department at Lowes.com
HDX 18 in. x 18 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-011818 - The Home Depot
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Filtrete 18x18x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 1 Filter - Walmart.com
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Filterbuy 18x18x1 Air Filter MERV 8 Odor Eliminator, Pleated HVAC AC Furnace Filters Replacement | Wayfair
