18" x 28" or 28" x 18" Cube Core Eggcrate Return Air Grille w24h24 + Product Spec Sheet 2-Way

+ Product Spec Sheet 2-Way Wall/Ceiling Register Spec Sheet

+ Product Details Size – 12"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 30 5/8" height

+ Product Details Size – 14" x 18" or 18" x 14" is the size for the duct opening measurement only

18" x 28" or 28" x 18" Cube Core Eggcrate Return Air Grille w24h24 + Product Spec Sheet 2-Way+ Product Details Size 18" x 28" or 28" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 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