34" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille actual front end outer dimensions

actual front end outer dimensions are approximately 23

actual front end outer dimensions are approximately 24 5/8" width X 38 5/8" height

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actual front end outer dimensions are approximately 27 5/8" width X 36 5/8" height

actual front end outer dimensions are approximately 20 5/8" width X 338 5/8" height

34" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 20" Or 20" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 19. 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