20" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter RV Mobile Home actual front end outer dimensions

actual front end outer dimensions are approximately 28 5/8" width X 26 5/8" height

Actual Filter Size – 31 3/4"w x 27 3/4" x 1"

14" Diameter Is The Size For The Duct Opening Measurement Only

Actual Filter Size – 15 3/4"w x 19 3/4" x 1"

during winter

20" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter RV Mobile Home actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 36" OR 36" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 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