24" x 26" or 26" x 24" Cube Core Eggcrate Return Air Grille Grilles + Product Details Size –

+ Product Details Size – 10" x 12" or 12" x 10" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 30 5/8" height

actual front end outer dimensions are approximately 34 5/8" width X 27 5/8" height -

+ Product Details Size - 32"w X 30"h is the size for the duct opening measurement only

24" x 26" or 26" x 24" Cube Core Eggcrate Return Air Grille Grilles + Product Details Size –+ Product Details Size 24" x 26" or 26" x 24" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 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