18" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 34 5/8"] 8in diameter + Product Details Size – 7" Round Duct Pipe CRG828 Product Details Size 14

+ Product Details Size – 22"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 12 5/8" height

+ Product Details Size – 22"w X 32"h is the size for the duct opening measurement only

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

Actual Filter Size – 7 3/4"w x 29 3/4" x 1"

18" X 32" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 20 5 8" X 34 5 8"] 8in diameter + Product Details Size – 7" Round Duct Pipe CRG828 Product Details Size 14 + Product Details Size – 22"w X 14"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 22 5 8" width X 12 5 8" height