24" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 26 5/8" X 20 5/8"] Black actual front end outer dimensions CRFG2028 Width_14in 4 X 12 Is

actual front end outer dimensions are approximately 52 5/8" width X 22 5/8" height -

+ Product Details Size - The listed 5" diameter refers specifically to the size of the duct opening

including Ductless Mini-Split

+ Product Details Size - 12"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 17

24" X 18" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 26 5 8" X 20 5 8"] Black actual front end outer dimensions CRFG2028 Width_14in 4 X 12 Is actual front end outer dimensions are approximately 52 5 8" width X 22 5 8" height + Product Details Size The listed 5" diameter refers specifically to the size of the duct opening