34" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter Some of our best features

Some of our best features aren't readily apparent

+ Product Details Size - 32"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 28 5/8" height

actual front end outer dimensions are approximately 22 5/8" width X 27 5/8" height

actual front end outer dimensions are 15" Width X 15" Height

34" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter Some of our best features+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 28" Or 28" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 27. 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