30" x 36" or 36" x 30" Cube Core Eggcrate Return Air Grille w36h36 + Product Details Size –

+ Product Details Size – 30" x 32" or 32" x 30" is the size for the duct opening measurement only

+ Product Details Size – 34"w X 32"h is the size for the duct opening measurement only

[Outer Dimensions: 38

40"w X 16"h Is The Size For The Duct Opening Measurement Only

Contorl Lever To Adjust Louvers According To Season - Complete Open For Summer To Release The Heat

30" x 36" or 36" x 30" Cube Core Eggcrate Return Air Grille w36h36 + Product Details Size –+ Product Details Size 30" x 36" or 36" x 30" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32. 5" X 38. 5". 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