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Filtrete 18-in W x 36-in L x 1-in MERV 5 Basic Pleated Air Filter in the Air Filters department at Lowes.com
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36" X 12 Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - HVAC Duct Cover - Flat Stamped Face - White [Outer Dimensions: 38 5/8" X 14 5/8"] - Amazon.com
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HDX 12 in. x 36 in. x 1 in. Standard Pleated Air Filter FPR 5, MERV 8 HDX1P5-011236 - The Home Depot
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Filtrete 12-in W x 36-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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HDX 12 in. x 36 in. x 1 in. Allergen Plus Pleated Air Filter FPR 7, MERV 11 HDX1P7-011236 - The Home Depot
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Filtrete 12x36x1 Air Filter MPR 1000 MERV 11, Allergen Defense, 6-Pack (exact dimensions 11.69x35.69x0.81) - Amazon.com
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American Air Filters 220-326-051 American Air Filter StrataDensity Panel Filter 12-Inch x 36-Inch x 1-Inch
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HDX 12 in. x 36 in. x 1 in. Standard Pleated Air Filter FPR 5, MERV 8 HDX1P5-011236 - The Home Depot
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HDX 12 in. x 36 in. x 1 in. Premium Pleated Air Filter FPR 10, MERV 13 HDX1P10-011236 - The Home Depot
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