28" x 28" Cube Core Eggcrate Return Air Grille return grille + Product Details Size -

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

actual front end outer dimensions are approximately 11

+ Product Details Size – 12"w X 12"h

+ Product Description Elevate your space with our elegant Ceiling Grille Diffuser

4" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

28" x 28" Cube Core Eggcrate Return Air Grille return grille + Product Details Size -+ Product Details Size 28" x 28" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 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 electric