Cart Continue shopping “20x20x4 (3-5/8) Pleated AC Filter Furnace Filter NORDIC” has been added to your cart. Product Price Quantity Subtotal × 20x20x5 (4 3/8) Honeywell/Lennox Replacement AC Filter Furnace Filter NORDIC $51.95 20x20x5 (4 3/8) Honeywell/Lennox Replacement AC Filter Furnace Filter NORDIC quantity $51.95 × 20x20x4 (3-5/8) Pleated AC Filter Furnace Filter NORDIC $36.95 20x20x4 (3-5/8) Pleated AC Filter Furnace Filter NORDIC quantity $36.95 Coupon: Apply coupon Update cart Cart totals Subtotal $88.90 Tax $0.00 Total $88.90 Proceed to checkout — OR —