24" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return + Product Details Size –

+ Product Details Size – 20" x 36" or 36" x 20" is the size for the duct opening measurement only

optimizing performance and energy efficiency

Actual Filter Size – 24 3/4"w x 29 3/4" x 1"

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

ensuring accurate thermostat operation

24" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 6" OR 6" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 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