14" x 34" or 34" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Diameter actual front end outer dimensions

actual front end outer dimensions are approximately 14 5/8" width X 20 5/8" height

+ Product Details Size – 14"w X 36"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 22" OR 22" x 18" duct opening (measured at the opening)

This grille has a high standard of design

14" x 34" or 34" x 14" 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 14" x 34" OR 34" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 33. 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