22" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coated + Product Details Size –

+ Product Details Size – 8" x 10" or 10" x 8" is the size for the duct opening measurement only

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+ Product Details Size – 34" x 34" is the size for the duct opening measurement only

75"H – fits a 16" X 16" duct opening

pair it with our butterfly dampers

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