18" X 30" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 32 5/8"] Grilles + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 8"w X 30"h is the size for the duct opening measurement only

+ Product Details Size - 14"w X 12"h is the size for the duct opening measurement only

minimizing waste

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

Actual Filter Size – 23 3/4"w x 17 3/4" x 1"

18" X 30" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 20 5 8" X 32 5 8"] Grilles + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 8"w X 30"h is the size for the duct opening measurement only + Product Details Size 14"w X 12"h is the size for the duct opening measurement only