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Castle Filters
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FILTER SIZING
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14x20x1 Air Filter MERV 11 4-Pack | DiscountFilters.com
Amazon.com: Castle Filters One-Year HVAC Furnace Filter, MERV 8, 14x25x1, 1 Count (Pack of 1) : Tools & Home Improvement
Air filtration: Balanced approach gives high filtration and energy efficiencies
