36" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter + Product Details Size -

+ Product Details Size - 24"w X 4"h is the size for the duct opening measurement only

Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

at predicted low air motion 35 fpm in the zone of occupancy

(Screws included)

36" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 30" OR 30" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 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