6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Grille 14in diameter Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 35 3/4" x 1"

actual front end outer dimensions are approximately 2" wider

+ Product Details Size – 30"w X 24"h is the size for the duct opening measurement only

+ Product Details Size - 24"w X 8"h is the size for the duct opening measurement only

6" x 28" or 28" x 6" Cube Core Eggcrate Return Air Grille 14in diameter Actual Filter Size – 31+ Product Details Size 6" x 28" or 28" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 29. 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