20" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper Designed for both wall and

Designed for both wall and ceiling applications

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

+ Product Details Size - 22"w X 36"h is the size for the duct opening measurement only

75" width X 31

+ Product Details Size - 32"w X 10"h is the size for the duct opening measurement only

20" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper Designed for both wall and+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 30" OR 30" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 29. 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