14" x 14" Cube Core Eggcrate Return Air Grille sidewall + Product Details Size –

+ Product Details Size – 30"w X 14"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 4"h is the size for the duct opening measurement only

+ Product Details Size – 36"w X 8"h is the size for the duct opening measurement only

and waste gases transmission lines

Operating from -40°F to +248°F

14" x 14" Cube Core Eggcrate Return Air Grille sidewall + Product Details Size –+ Product Details Size 14" x 14" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 15. 75" X 15. 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 electric