Actual Dimensions: 19.88 x 24.88 x 4.38. Accumulair brand: 20x25x5 Honeywell F55F1003 replacement whole house air filters, exactly built to replace the original manufacturer Honeywell F55F1003 filters. Fully assembled so no assembly or combs required. MERV rated to ASHRAE ratings ensuring particle capture to the level of the OEM Honeywell F55F1003 filter. Note: The sample air filter picture as displayed is not the actual dimensions and is included to show construction purposes. OEM names and Honeywell F55F1003 P/N included for filter style purposes only.
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