14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Grille Curved Blade Steel + Product Details Size –

+ Product Details Size – 8" x 20" or 20" x 8" is the size for the duct opening measurement only

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Installation is hassle-free

+ Product Details Size - 16"w X 30"h is the size for the duct opening measurement only

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14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Grille Curved Blade Steel + Product Details Size –+ Product Details Size 14" x 28" or 28" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 16. 5" X 30. 5". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing