20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille Outdoor Vent Covers 75"H – fits a 12"

75"H – fits a 12" X 8" duct opening

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75"H – fits a 14" X 14" duct opening

is fireproof and ensures efficient thermal performance

Our coils have a very high PSI burst pressure

20" x 34" or 34" x 20" Cube Core Eggcrate Return Air Grille Outdoor Vent Covers 75"H – fits a 12"+ 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