28" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 34 5/8"] Ceiling + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 22"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 30 5/8" width X 22 5/8" height

actual front end outer dimensions are approximately 34 5/8" width X 16 5/8" height

actual front end outer dimensions are approximately 10 5/8" width X 36 5/8" height

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28" X 32" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 30 5 8" X 34 5 8"] Ceiling + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 22"w X 28"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 30 5 8" width X 22 5 8" height