12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Grille Color_Red Oak + Product Details Size –

+ Product Details Size – 20"w X 4"h is the size for the duct opening measurement only

For 8" Round Duct Opening - Spiral or Flex

With HVAC Premium you get an extra measure of quality that will be visible to your family members and house guests

actual front end outer dimensions are approximately 22 5/8" width X 24 5/8" height

this diffuser is the perfect blend of function and style for your home

12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Grille Color_Red Oak + Product Details Size –+ 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