10" x 20" or 20" x 10" Cube Core Eggcrate Return Air Grille Floor Grille 75" width X 31

75" width X 31

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+ Product Details Size – 12" x 30" or 30" x 12" is the size for the duct opening measurement only

All of these grills have dampers

Every grille has a front end frame that will overlap at the wall joint

10" x 20" or 20" x 10" Cube Core Eggcrate Return Air Grille Floor Grille 75" width X 31+ Product Details Size 10" x 20" or 20" x 10" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 11. 75" X 21. 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