22" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Diameter actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 8 5/8" height -

+ Product Details Size – 22" x 28" or 28" x 22" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 34 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 6" OR 6" x 24" duct opening (measured at the opening)

+ Product Spec Sheet Extruded Aluminum Ceiling Diffuser Spec Sheet

22" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Diameter actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 12" OR 12" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 11. 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