22" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Filter Size – 31

Actual Filter Size – 31 3/4"w x 11 3/4" x 1"

actual front end outer dimensions are approximately 22 5/8" width X 14 5/8" height -

+ Product Details Size - 12"w X 24"h X 2"d (for duct opening measurement only)

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22" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Filter Size – 31+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 28" OR 28" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 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