20" X 12" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 22 5/8" X 14 5/8"] w32h32 + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 16"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 20"w X 12"h is the size for the duct opening measurement only

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

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

875" width X 9

20" X 12" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 22 5 8" X 14 5 8"] w32h32 + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 16"w X 36"h is the size for the duct opening measurement only + Product Details Size 20"w X 12"h is the size for the duct opening measurement only