20" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 38 5/8" height

Filter Size - 33

+ Product Details Size – 28"w X 26"h is the size for the duct opening measurement only

this grille boasts a natural warmth and fine finish

Actual Filter Size – 17 3/4"w x 17 3/4" x 1"

20" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 14" OR 14" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 13. 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