22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w8h8 + Product Details Size –

+ Product Details Size – 22"w X 30"h is the size for the duct opening measurement only

+ Product Details Size – 24" x 32" or 32" x 24" is the size for the duct opening measurement only

14" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover

+ Product Spec Sheet Outdoor Louver Spec Sheet

22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w8h8 + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 18" OR 18" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 17. 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