18" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 28 5/8"] Color_Red Oak Wood actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 18 5/8" height

order a 14x20 grille

+ Product Details Size – 30"w X 12"h is the size for the duct opening measurement only

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

actual front end outer dimensions are approximately 32 5/8" width X 16 5/8" height -

18" X 26" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 20 5/8" X 28 5/8"] Color_Red Oak Wood actual front end outer dimensions+ Product Details Size 18"w X 26"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 5 8" width X 28 5 8" height Actual Filter Size 17 3 4"w x 25 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.