Description
Actual size is 19.88 x 24.88 x 4.38. Accumulair brand 20x25x5 Lennox X6661 compatible whole house filters, specifically designed to replace the OEM Lennox X6661 air filters. Fully box-formed with no assembly or combs required. MERV classified to ASHRAE standards establishing performance to the level of the name brand Lennox X6661 filters. Photo: The example filter pic as displayed is not to scale and is there to show construction purposes only. Brand names and Lennox X6661 part numbers are shown for air filter replacement identification only.