24" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10in diameter Insulation – A thick blanket

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 4

maintaining their elegant

Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

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

with actual outer dimensions of 16

24" x 20" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10in diameter Insulation – A thick blanket+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 20" OR 20" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 19. 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