14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 With its reliable construction and

With its reliable construction and sleek design

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

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

+ Product Spec Sheet Round Ceiling Diffuser Spec Sheet

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14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 With its reliable construction and+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 26" OR 26" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 25. 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