12" x 26" or 26" x 12" Cube Core Eggcrate Return Air Grille w36h36 actual front end outer dimensions

actual front end outer dimensions are approximately 29

75" width X 11

Width vs Height:

actual front end outer dimensions are approximately 26 5/8" width X 24 5/8" height

12" x 26" or 26" x 12" Cube Core Eggcrate Return Air Grille w36h36 actual front end outer dimensions+ Product Details Size 12" x 26" or 26" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 27. 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