12" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 22 5/8"] w14h14 + Product Details Size -

+ Product Details Size - 25"w X 28"h is the size for the duct opening measurement only

+ Product Details Size - 14"w X 10"h is the size for the duct opening measurement only

+ Product Description Upgrade your HVAC system with our 4" Round Air Vent Supply Grille

designed for optimal airflow and efficiency

This grille is ideal for both sidewall and ceiling installations

12" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 22 5/8"] w14h14 + Product Details Size -+ Product Details Size 12"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 22 5 8" height Actual Filter Size 11 3 4"w x 19 3 4" x 1" High quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter