32" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w36h36 Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 9 3/4" x 1"

actual front end outer dimensions are approximately 21 5/8" width X 33 5/8" height

ensuring even air distribution throughout your space

+ Product Details Size – 22"w X 18"h is the size for the duct opening measurement only

For 6" Round Duct Opening - Spiral or Flex

32" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w36h36 Actual Filter Size – 25+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 28" OR 28" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 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