Description
Actual Size: 17.75 x 17.75 x 3.75. Our (Accumulair brand) 18x18 Honeywell FC40R1185 substitute grille filter is specifically made to substitute for the original FC40R1185 return air grille filter style. Preassembled; no assembly necessary. Note: Sample filter image displayed is not to scale and is displayed for lip construction purposes. *Company names and FC40R1185 part number are listed for air filter replacement identification use. Catalog and FC40R1185 specs last updated on 02/15/2025.