28" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Outdoor Vent Covers + Product Details Size -

+ Product Details Size - 25"w X 22"h is the size for the duct opening measurement only

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

6" width X 15

this grill is the epitome of excellence in both form and function

Whether you're restoring an old Victorian or craftsman style home

28" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Outdoor Vent Covers + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 36" OR 36" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 35. 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