16" x 36" or 36" x 16" Cube Core Eggcrate Return Air Grille 6" Diameter actual front end outer dimensions

actual front end outer dimensions are approximately 12 5/8" width X 12 5/8" height -

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

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75"H – fits a 14" X 8" duct opening

16" x 36" or 36" x 16" Cube Core Eggcrate Return Air Grille 6" Diameter actual front end outer dimensions+ Product Details Size 16" x 36" or 36" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 75" X 37. 75". 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