12" x 36" or 36" x 12" Cube Core Eggcrate Return Air Grille 2-Way + Product Details Size –

+ Product Details Size – 20"w X 25"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 22 5/8" height

ventilating and cooling

rust-free aluminum construction with smooth finished edges and counter-sunk screw holes (screws included)

Design – This airflow control component are made to connect to a drop ceiling lay-in diffuser grille

12" x 36" or 36" x 12" Cube Core Eggcrate Return Air Grille 2-Way + Product Details Size –+ Product Details Size 12" x 36" or 36" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 37. 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