28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Set + Product Details Size –

+ Product Details Size – 24" x 36" or 36" x 24" is the size for the duct opening measurement only

+ Product Details Size – 22" x 30" or 30" x 22" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 36 5/8" width X 24 5/8" height

10" x 8" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Set + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 14" OR 14" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 13. 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