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

actual front end outer dimensions are approximately 26 5/8" width X 10 5/8" height

Actual Filter Size – 11 3/4"w x 19 3/4" x 1"

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Traditional HVAC systems were designed for cold air

20" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Black actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 6" OR 6" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 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