Actual size is 19.75 x 19.88 x 4.38. Accumulair brand 20x20x5 Honeywell F58A1050 style whole house filters, specifically built to replace the original manufacturer Honeywell F58A1050 air filters. Completely built so no forming or combs needed. MERV rated to ASHRAE 52.2 test specifications assuring operation to the level of the OEM Honeywell F58A1050 air filters. Note: The example filter image as shown is not true to size and is there to show configuration purposes. Brand names and Honeywell F58A1050 identifier used for filter substitution identification purposes only.
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