Actual Size: 17.75 x 29.75 x 3.75. Our Accumulair brand 18x30 Honeywell FC40R1830 substitute return grille air filter is solely designed to replace the OEM FC40R1830 grille filter style. No assembly required. Note: The example filter image displayed is not the actual dimensions and is included to show lip configuration only. *OEM names and FC40R1830 part number shown for air filter style identification. Current stock and FC40R1830 specs current as of 03/22/2020.
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