30" x 36" or 36" x 30" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" actual front end outer dimensions

actual front end outer dimensions are approximately 27 5/8" width X 28 5/8" height

Actual Filter Size – 31 3/4"w x 31 3/4" x 1"

1/2” - 3119 PSI

is fireproof and ensures efficient thermal performance

Heavy-gauge all-steel construction

30" x 36" or 36" x 30" Cube Core Eggcrate Return Air Grille Compatible with Duct 10" actual front end outer dimensions+ Product Details Size 30" x 36" or 36" x 30" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32. 5" X 38. 5". 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