34" x 34" Cube Core Eggcrate Return Air Grille Round Damper Ring + Product Details Size –

+ Product Details Size – 25"w X 26"h is the size for the duct opening measurement only

+ How To Measure A Grille

+ Product Details Size - 5" Diameter is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 17 3/4" x 1"

34" x 34" Cube Core Eggcrate Return Air Grille Round Damper Ring + Product Details Size –+ Product Details Size 34" x 34" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 35. 75" X 35. 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 electric