16" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grille actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 20 5/8" height

+ Product Details Size - 32"w X 4"h is the size for the duct opening measurement only

How to Measure Your Vent Hole Before Ordering a Grille

Crafted from high-quality red oak wood

+ Product Details Size - 8"w X 20"h is the size for the duct opening measurement only

16" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Grille actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 20" OR 20" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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