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Amazon.com: GermGuardian AC Furnace Filter, 20x25x1, MERV 12, MPR 1500, 4-Pack 1-Year Supply, FF20254PK : Tools & Home Improvement
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Nordic Pure 20x25x1 (19 1/2 x 24 1/2 x 3/4) Pleated MERV 12 Air Filters 6 Pack - Replacement Furnace Filters - Amazon.com
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