28" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 14 5/8"] Fixed Blades with Damper + Product Details Size –

+ Product Details Size – 32"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 10 5/8" width X 26 5/8" height

actual front end outer dimensions are approximately 16 5/8" width X 22 5/8" height

It comes with two versatile mounting base options—solid and ring—making installation simple and flexible

28" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 14 5/8"] Fixed Blades with Damper + Product Details Size –+ Product Details Size 28"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 30 5 8" width X 14 5 8" height Actual Filter Size 27 3 4"w x 11 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.