6" x 14" or 14" x 6" Cube Core Eggcrate Return Air Grille Return addEventListener('click'

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+ Product Details Size – 12" x 30" or 30" x 12" is the size for the duct opening measurement only

guaranteeing efficient ventilation throughout your space

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8

6" x 14" or 14" x 6" Cube Core Eggcrate Return Air Grille Return addEventListener('click'+ Product Details Size 6" x 14" or 14" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 75" X 15. 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