Actual Dimensions: 15.5 x 19.88 x 4.25. Accumulair brand: 16x20x4.5 Carrier FILCCFNC0017 replacement whole house air filters, specifically built to replace the original manufacturer Carrier FILCCFNC0017 air filters. Completely assembled with no forming or combs required. MERV graded to ASHRAE 52.2 test grades assuring particulate filtration to the level of the original manufacturer Carrier FILCCFNC0017 filter. Notice: The sample air filter picture as shown is not to scale and is shown for construction only. Brand names and Carrier FILCCFNC0017 identifier included for air filter replacement identification purposes only.