8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 24.5"] Brown + Product Details Size -

+ Product Details Size - 28"w X 8"h is the size for the duct opening measurement only

+ Product Details Size – 22" x 26" or 26" x 22" is the size for the duct opening measurement only

this diffuser ensures long-lasting durability and adds a touch of elegance to any space

ensuring a clean and smooth appearance in any environment

3 * Insulation density is 30kgs/CBM = 0

8" x 22" or 22" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 10.5" X 24.5"] Brown + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 8" x 22" or 22" x 8" duct opening (measured at the opening), with actual outer dimensions of 10. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 7. 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