22" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter d Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 8" duct openings

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 6" duct openings

actual front end outer dimensions are approximately 32 5/8" width X 14 5/8" height -

+ Product Details Size - 18"w X 12"h is the size for the duct opening measurement only

+ Product Details Size – 16" x 34" or 34" x 16" is the size for the duct opening measurement only

22" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter d Ideal for Walls & Ceilings:+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 16" OR 16" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 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