26" x 6" or 6" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Round Duct Pipe designed for both sidewall and

designed for both sidewall and ceiling installations

actual front end outer dimensions are approximately 26 5/8" width X 38 5/8" height -

and sound level range of NC 25 to 35

actual front end outer dimensions are approximately 32 5/8" width X 26 5/8" height

+ Product Details Size – 30"w X 14"h is the size for the duct opening measurement only

26" x 6" or 6" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18" Round Duct Pipe designed for both sidewall and+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 6" OR 6" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 5. 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 Made