12" x 30" or 30" x 12" Cube Core Eggcrate Return Air Grille w8h8 + Product Details Size -

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

If you are looking to enhance your project with a top-of-the-line unit

+ Product Details Operating Temperature From -40°F To +248°F [-40°C To +120°C]

allow you to customize airflow direction with ease

+ Product Details Size – 14" x 30" or 30" x 14" is the size for the duct opening measurement only

12" x 30" or 30" x 12" Cube Core Eggcrate Return Air Grille w8h8 + Product Details Size -+ Product Details Size 12" x 30" or 30" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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