20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille Outdoor Vent Covers + Product Details Size –

+ Product Details Size – 25"w X 28"h is the size for the duct opening measurement only

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+ Product Description Introducing our High-Quality Copper Coil

+ Product Details Size – 24"w X 34"h is the size for the duct opening measurement only

3-cone supply grille

20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille Outdoor Vent Covers + Product Details Size –+ Product Details Size 20" x 34" or 34" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 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