6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Grille Material_Steel + Product Details Size -

+ Product Details Size - 28"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 19 3/4" x 1"

actual front end outer dimensions are approximately 24 5/8" width X 27 5/8" height

+ Product Details Size – 14"w X 28"h is the size for the duct opening measurement only

Whilst the maximum pressure for R410 is 700 PSI

6" x 22" or 22" x 6" Cube Core Eggcrate Return Air Grille Material_Steel + Product Details Size -+ Product Details Size 6" x 22" or 22" x 6" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 7. 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