28" X 14" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 16 5/8"] w6h6 + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 22"w X 34"h is the size for the duct opening measurement only

Actual Filter Size – 9 3/4"w x 25 3/4" x 1"

actual front end outer dimensions are approximately 22 5/8" width X 10 5/8" height

+ Product Details Size – 18"w X 10"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 12 5/8" height

28" X 14" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 30 5 8" X 16 5 8"] w6h6 + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 22"w X 34"h is the size for the duct opening measurement only Actual Filter Size – 9 3 4"w x 25 3 4" x 1"