14" x 30" or 30" x 14" Cube Core Eggcrate Return Air Grille sidewall The first number in a

The first number in a grille size

represents the width

3/4” - 2981 PSI

Our grilles feature a durable powder-coat finish

14" x 30" or 30" x 14" Cube Core Eggcrate Return Air Grille sidewall The first number in a+ Product Details Size 14" x 30" or 30" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 75" X 31. 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