28" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 14 5/8"] w36h36 4" X 14" Is The

4" X 14" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

Its elegant look and fine finish and the natural warmth of oak wood

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positioning supply and return grills accordingly

Installation Location – Sidewall & ceiling

28" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 14 5/8"] w36h36 4" X 14" Is The+ 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.