Great Value Air Filters at Walmart: Up to 50% off + free shipping w/ $35

They are available in various sizes and MERV ratings, most at 50% off. We've pictured the Great Value 20x24x1 MERV 13 HVAC Air and Furnace Filter 2-Pack for $13 (half off). Get free shipping over $35, otherwise it adds $7. Shop Now at Walmart