14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12in diameter accordion-header')

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+ Product Details Size - 25"w X 24"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 16" Width X 10" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

Installation Location – Sidewall and ceiling

14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12in diameter accordion-header')+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 28" OR 28" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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