36" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 22" OR 22" x 26" duct opening (measured at the opening)

our Butterfly Damper simplifies the process of managing airflow

Every grille has a front end frame that will overlap at the wall joint

3/4" - 2981 PSI

36" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 20" OR 20" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 19. 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