16" x 34" or 34" x 16" Cube Core Eggcrate Return Air Grille Insulated Line Set actual front end outer dimensions

actual front end outer dimensions are approximately 28 5/8" width X 32 5/8" height

+ Product Details Size - 8"w X 32"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 38 5/8" width X 36 5/8" height

4" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

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

16" x 34" or 34" x 16" Cube Core Eggcrate Return Air Grille Insulated Line Set actual front end outer dimensions+ Product Details Size 16" x 34" or 34" x 16" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 17. 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