Actual dimensions are 19.75 x 19.88 x 4.38. Accumulair brand 20x20x5 Lennox X7930 substitute whole house filters, specifically designed to replace OEM Lennox X7930 filters. Completely built with no forming or combs required. MERV graded to ASHRAE 52.2 test standards ensuring particle capture as good or better than the original brand Lennox X7930 filter. Photo: Sample air filter image as displayed is not true to size and is there to show style purposes. Company names and Lennox X7930 identifier are used for air filter substitution identification purposes only.