14" x 25" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grilles + Product Details Size –

+ Product Details Size – 16" x 16" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 20" or 20" x 12" duct opening (measured at the opening)

Filter Size - 9

During summer

14" x 25" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grilles + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 25" OR 25" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 27. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 24. 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