34" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Round Duct Pipe + How To Measure A

+ How To Measure A Grille Measure the size of the vent opening

For 14" Round Duct Opening - Spiral or Flex

+ Product Details Size – 24"w X 16"h is the size for the duct opening measurement only

+ Why HVAC Premium HVAC Premium has been providing superior quality service for many years

34" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12" Round Duct Pipe + How To Measure A+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 24" Or 24" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 23. 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