28" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Adjustable Return actual front end outer dimensions

actual front end outer dimensions are approximately 34 5/8" width X 20 5/8" height

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

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14"w X 3"h Is The Size For The Duct Opening Measurement Only

Actual Filter Size – 17 3/4"w x 25 3/4" x 1"

28" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Adjustable Return actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 22" OR 22" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 21. 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