12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Grille Color_White Operating temperature from -40°f to

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

with an additional 1 7/8" width and 2" height

+ Product Details Size – 16" x 18" or 18" x 16" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 2" wider

12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Grille Color_White Operating temperature from -40°f to+ 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