22" x 36" or 36" x 22" Cube Core Eggcrate Return Air Grille 1-Way + Product Details Size –

+ Product Details Size – 34"w X 26"h is the size for the duct opening measurement only

+ Product Details Size - 6"w X 18"h is the size for the duct opening measurement only

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

+ Product Details Size – 32"w X 34"h is the size for the duct opening measurement only

Operating temperature from -40°f to +248°f [-40°c to +120°c]

22" x 36" or 36" x 22" Cube Core Eggcrate Return Air Grille 1-Way + Product Details Size –+ Product Details Size 22" x 36" or 36" x 22" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23. 75" X 37. 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