18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w30h30 + Product Details Size -

+ Product Details Size - 28"w X 34"h is the size for the duct opening measurement only

this grille is a testament to high standard craftsmanship

75"H – fits a 18" X 12" duct opening

nextElementSibling

+ Product Details Size – 34"w X 20"h is the size for the duct opening measurement only

18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w30h30 + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 14" OR 14" X 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 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