22" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Diameter our damper helps create a

our damper helps create a well-balanced indoor environment

easy unrestricted airflow

actual front end outer dimensions are approximately 32 5/8" width X 26 5/8" height -

this model ensures top-notch air quality

featuring a 8" round duct opening

22" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Diameter our damper helps create a+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 36" OR 36" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 35. 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