20" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 28 5/8"] w10h10 + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 32"w X 18"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 24"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 15 3/4" x 1"

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

20" X 26" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 22 5 8" X 28 5 8"] w10h10 + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 32"w X 18"h is the size for the duct opening measurement only + Product Details Size 26"w X 24"h is the size for the duct opening measurement only