8" x 34" or 34" x 8" Cube Core Eggcrate Return Air Grille w25h25 + Product Details Size -

+ Product Details Size - 20"w X 30"h is the size for the duct opening measurement only

please note that the total outer dimensions of the grille measure 14" in diameter

+ Product Details Size - 24"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 28 5/8" height

+ Product Details Outer dimensions: 31

8" x 34" or 34" x 8" Cube Core Eggcrate Return Air Grille w25h25 + Product Details Size -+ Product Details Size 8" x 34" or 34" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 35. 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