14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in + Product Details Size -

+ Product Details Size - 22"w X 34"h is the size for the duct opening measurement only

40" x 16" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply

+ Product Details Size – 29"w X 22"h is the size for the duct opening measurement only

and lay it flat in the grid

actual front end outer dimensions are approximately 14 5/8" width X 16 5/8" height

14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Width_20in + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 16" OR 16" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 15. 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