18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 6" } /* CONTENT SPACING */

} /* CONTENT SPACING */ #hvac-product-accordion

+ Product Details Size – 10" round duct opening-

accordion-header { display: flex

+ Product Details Size - 30"w X 18"h X 2"d (for duct opening measurement only)

For 10" duct opening

18" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 6" } /* CONTENT SPACING */+ 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