28" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter RV Mobile Home + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 12" OR 12" x 30" duct opening (measured at the opening)

Heat Pump And Centralized Air Ducted Units

Actual Filter Size – 9 3/4"w x 9 3/4" x 1"

+ Product Details Size – 14" X 4" is the size for the duct opening (floor/vent hole) measurement only

28" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter RV Mobile Home + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 8" OR 8" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 5. 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