28" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w10h10 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 22" or 22" x 10" duct opening (measured at the opening)

The design eliminates noise and prevents louvers from vibrating

+ Product Details Size – 25"w X 26"h is the size for the duct opening measurement only

vibration-free performance

28" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w10h10 + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 22" OR 22" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 21. 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