22" x 28" or 28" x 22" Cube Core Eggcrate Return Air Grille w10h10 Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 4" duct openings

actual front end outer dimensions are approximately 34 5/8" width X 36 5/8" height

+ Product Details Size – 24" x 24" with 10" collar T-Bar drop ceiling perforated return grill - metal back casing

+ Product Details Size – 14" x 28" or 28" x 14" is the size for the duct opening measurement only

22" x 28" or 28" x 22" Cube Core Eggcrate Return Air Grille w10h10 Ideal for Walls & Ceilings:+ Product Details Size 22" x 28" or 28" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 75" X 29. 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