20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille with filter Design – removable door/face for

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

actual front end outer dimensions are approximately 24 5/8" width X 38 5/8" height

but still very thin

actual front end outer dimensions are approximately 52 5/8" width X 22 5/8" height -

20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille with filter Design – removable door/face for+ Product Details Size 20" x 34" or 34" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" X 35. 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