36" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter For example

For example

+ Product Details Size - 25"w X 8"h is the size for the duct opening measurement only

Copper coil line set fits most ductless mini split air conditioners

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 22" or 22" x 10" duct opening (measured at the opening)

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36" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter For example+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 16" OR 16" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 15. 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