34" x 36" or 36" x 34" Cube Core Eggcrate Return Air Grille Material_Steel This thoughtful design ensures optimal

This thoughtful design ensures optimal air circulation for your HVAC system

and smooth surface

Actual Filter Size – 25 3/4"w x 35 3/4" x 1"

actual front end outer dimensions are approximately 36 5/8" width X 26 5/8" height

34" x 36" or 36" x 34" Cube Core Eggcrate Return Air Grille Material_Steel This thoughtful design ensures optimal+ Product Details Size 34" x 36" or 36" x 34" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 35. 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