20" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling this HVAC air supply grille

this HVAC air supply grille offers the perfect combination of style

+ Product Details Size – 8"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 28 5/8" width X 14 5/8" height

Its sturdy construction guarantees a smooth

75"H – fits a 18" X 8" duct opening

20" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling this HVAC air supply grille+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 12" OR 12" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 11. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum