26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Aluminum Energy Efficient – Air-tight inner

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

Design – This airflow control component are made to connect to a drop ceiling lay-in diffuser grille

The integral multi-shutter damper with a convenient handle operator ensures that you can easily adjust the air volume

+ Product Details Size - 10"w X 6"h is the size for the duct opening measurement only

function () { const item = this

26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Aluminum Energy Efficient – Air-tight inner+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 18" OR 18" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 17. 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