20" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Floor Grille + Product Details Size -

+ Product Details Size - 34"w X 34"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 14" or 14" x 12" duct opening (measured at the opening)

actual front end outer dimensions are 22" width X 6" height

+ Product Details Size - 22"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 16"w X 8"h is the size for the duct opening measurement only

20" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Floor Grille + Product Details Size -+ 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