28" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in helping to maintain consistent temperature

helping to maintain consistent temperature settings

+ Product Details Size – 18" x 32" or 32" x 18" is the size for the duct opening measurement only

+ Product Details Size – 10"w X 8"h is the size for the duct opening measurement only

with actual outer dimensions of 30

actual front end outer dimensions are 27

28" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in helping to maintain consistent temperature+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 20" OR 20" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 19. 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