28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 + Product Details Size –

+ Product Details Size – 18" x 26" or 26" x 18" is the size for the duct opening measurement only

+ Product Details Size – 32"w X 24"h is the size for the duct opening measurement only

heat pump and centralized air ducted units

Its elegant look and fine finish and the natural warmth of oak wood

Versatility and Durability: The red oak wood not only adds a touch of warmth and softness to your room but can also be sanded and refinished according to your specific application needs

28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w14h14 + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 30" OR 30" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 29. 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