28" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grilles The process is intuitive: simply

The process is intuitive: simply select the appropriate ceiling square for your grill

+ Product Spec Sheet Outdoor Louver Spec Sheet

+ Product Details Size – 25"w X 20"h is the size for the duct opening measurement only

+ Product Details Size – 20"w X 36"h is the size for the duct opening measurement only

28" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grilles The process is intuitive: simply+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 32" OR 32" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 31. 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