30" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8in diameter + Product Details Size -

+ Product Details Size - 20"w X 14"h is the size for the duct opening measurement only

Ring Base Design – Allows for easy installation without removing the thermostat

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

equipped with a lever for airflow dampening

+ Product Details Size – 12" x 16" or 16" x 12" is the size for the duct opening measurement only

30" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8in diameter + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 24" OR 24" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 23. 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