28" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 34 5/8"] Return + Product Details Size -

+ Product Details Size - 24"w X 14"h is the size for the duct opening measurement only

please note that the total outer dimensions of the grille measure 8" in diameter

actual front end outer dimensions are approximately 24 5/8" width X 20 5/8" height

Premium Airflow Efficiency - High-performance cube core eggcrate design allows 95% airflow efficiency

+ Product Description Maximize the efficiency of your ventilation system with our top-of-the-line HVAC grilles and registers

28" X 32" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 34 5/8"] Return + Product Details Size -+ Product Details Size 28"w X 32"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 30 5 8" width X 34 5 8" height Actual Filter Size 27 3 4"w x 31 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.