30" x 36" or 36" x 30" Cube Core Eggcrate Return Air Grille w36h36 [Outer Dimensions: 38

[Outer Dimensions: 38

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

Design – Removable door/face for easy filter change & cleaning - uses a 1" thick filter

actual front end outer dimensions are approximately 34 5/8" width X 20 5/8" height

Contorl Lever To Adjust Louvers According To Season - Complete Open For Summer To Release The Heat

30" x 36" or 36" x 30" Cube Core Eggcrate Return Air Grille w36h36 [Outer Dimensions: 38+ 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