26" x 36" or 36" x 26" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + Product Description Ventilate your

+ Product Description Ventilate your home or commercial space with our Aluminum Outdoor Weatherproof Louvers

undisturbed airflow

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 6" duct openings

actual front end outer dimensions are approximately 28 5/8" width X 36 5/8" height

Actual Filter Size – 25 3/4"w x 25 3/4" x 1"

26" x 36" or 36" x 26" Cube Core Eggcrate Return Air Grille Compatible With Duct 8in + Product Description Ventilate your+ Product Details Size 26" x 36" or 36" x 26" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27. 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