18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Grille white actual front end outer dimensions

actual front end outer dimensions are approximately 34 5/8" width X 36 5/8" height

+ Product Details Size – 26"w X 16"h is the size for the duct opening measurement only

Airflow Control – Adjustable airflow lever allows precise control over the direction and volume of air

+ Product Details Size – 24"w X 8"h is the size for the duct opening measurement only

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18" x 26" or 26" x 18" Cube Core Eggcrate Return Air Grille white actual front end outer dimensions+ Product Details Size 18" x 26" or 26" x 18" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 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