14" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line + Product Details Size -

+ Product Details Size - 36"w X 4"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 16"h is the size for the duct opening measurement only

allowing you to update the aesthetic in your home without losing valuable seasonal control of your HVAC system

Our innovative adjustable design changes the game

Actual Filter Size – 23 3/4"w x 23 3/4" x 1"

14" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 30" OR 30" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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