32" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 + Product Details Size –

+ Product Details Size – 22"w X 16"h is the size for the duct opening measurement only

+ Product Details Size – 20"w X 14"h is the size for the duct opening measurement only

[Outer Dimensions: 32

Actual Filter Size – 31 3/4"w x 21 3/4" x 1"

32" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 + Product Details Size –+ 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