12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set Actual Filter Size – 29

Actual Filter Size – 29 3/4"w x 23 3/4" x 1"

actual front end outer dimensions are approximately 32 5/8" width X 30 5/8" height

actual front end outer dimensions are approximately 10 5/8" width X 34 5/8" height

background-color: #000

12" x 28" or 28" x 12" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set Actual Filter Size – 29+ Product Details Size 12" x 28" or 28" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 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