28" x 36" or 36" x 28" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set + Product Details Size -

+ Product Details Size - 30"w X 4"h is the size for the duct opening measurement only

4" X 10" Brass Victorian Floor Register Grille - Modern Contempo Decorative Grate - HVAC Vent Duct Cover - Brass Plated

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

line-height: 1

+ Product Details Size - 8"w X 22"h is the size for the duct opening measurement only

28" x 36" or 36" x 28" Cube Core Eggcrate Return Air Grille Copper Coil-Insulated Line Set + Product Details Size -+ Product Details Size 28" x 36" or 36" x 28" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 29. 75" X 37. 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