28" x 30" or 30" x 28" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe Control Your Airflow on drop

Control Your Airflow on drop ceiling grilles

+ Product Details Size - 26"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 5 3/4" x 1"

Actual Filter Size – 15 3/4"w x 24 3/4" x 1"

Its elegant look and fine finish and the natural warmth of oak wood

28" x 30" or 30" x 28" Cube Core Eggcrate Return Air Grille 18" Round Duct Pipe Control Your Airflow on drop+ Product Details Size 28" x 30 or 30" x 28" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 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