30" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 32 5/8" X 14 5/8"] w36h36 + Product Details Size –

+ Product Details Size – 24"w X 12"h is the size for the duct opening measurement only

If your duct opening is 14 inches in diameter

this grille boasts a natural warmth and fine finish

Slots are angled to diversify the airflow in 2 way direction

actual front end outer dimensions are approximately 38 5/8" width X 14 5/8" height -

30" X 12" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 32 5/8" X 14 5/8"] w36h36 + Product Details Size –+ Product Details Size 30"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32 5 8" width X 14 5 8" height Actual Filter Size 29 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.