6" x 36" or 36" x 6" Cube Core Eggcrate Return Air Grille 8in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 21 5/8" width X 33 5/8" height

actual front end outer dimensions are approximately 28 5/8" width X 34 5/8" height

+ Product Details Size – 28"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 30 5/8" width X 30 5/8" height

much more than required 700 PSI for R410

6" x 36" or 36" x 6" Cube Core Eggcrate Return Air Grille 8in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 21 5 8" width X 33 5 8" height actual front end outer dimensions are approximately 28 5 8" width X 34 5 8" height