30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grilles actual front end outer dimensions

actual front end outer dimensions are approximately 24 5/8" width X 16 5/8" height

+ Product Details Size – 36"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 24 5/8" width X 20 5/8" height

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 8" duct openings

ensuring optimal air distribution throughout any room

30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grilles actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 6" OR 6" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 5. 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 Made