Quick view Compare Temporarily out of stock 20x20x4 MERV 8 HVAC Air Filters $17.99 As Low as $10.99 per Filter! 20 x 20 x 4 MERV 8 HVAC Air Filters. Actual Dimensions: 19 ½” x 19 ½” x 3 ¾”. Filtration Rating: MERV 8, MPR 600, FPR 5. Blocks and...
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