8" x 28" or 28" x 8" Cube Core Eggcrate Return Air Grille RG66 Black-HP Actual Filter Size – 15

Actual Filter Size – 15 3/4"w x 15 3/4" x 1"

The installation process is a breeze

+ Product Details Size - 28"w X 10"h is the size for the duct opening measurement only

ensuring they don't overlap

actual front end outer dimensions are approximately 12 5/8" width X 20 5/8" height

8" x 28" or 28" x 8" Cube Core Eggcrate Return Air Grille RG66 Black-HP Actual Filter Size – 15+ Product Details Size 8" x 28" or 28" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 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