12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Grille Ceiling actual front end outer dimensions

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

Actual Filter Size – 24 3/4"w x 33 3/4" x 1"

Actual Filter Size – 15 3/4"w x 21 3/4" x 1"

+ Product Details Size – 24" x 24" with 12" collar T-Bar drop ceiling perforated return grill - metal back casing

12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Grille Ceiling actual front end outer dimensions+ Product Details Size 12" x 22" or 22" x 12" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 13. 75" X 23. 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