22" x 26" or 26" x 22" Cube Core Eggcrate Return Air Grille Insulated Line Set + Product Details Size –

+ Product Details Size – 30"w X 36"h is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 19 3/4" x 1"

Rigid Built For External Use – The sturdy and rigid design features noise-free components that eliminate vibration and excess noise to the louvers

+ Product Details Size – 16"w X 36"h is the size for the duct opening measurement only

22" x 26" or 26" x 22" Cube Core Eggcrate Return Air Grille Insulated Line Set + Product Details Size –+ Product Details Size 22" x 26" or 26" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 75" X 27. 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