34" x 34" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 34 5/8" height

+ Product Details Size - 28"w X 30"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 6" duct openings

Actual Filter Size – 27 3/4"w x 9 3/4" x 1"

+ Product Details Size – 18"w X 24"h is the size for the duct opening measurement only

34" x 34" Cube Core Eggcrate Return Air Grille Aluminum Adjustable Curved Blade actual front end outer dimensions+ Product Details Size 34" x 34" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 35. 75" X 35. 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