30" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w26h26 this guard fits almost any

this guard fits almost any thermostat and blends seamlessly into any setting

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+ Product Details Size - 16"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 32"w X 32"h is the size for the duct opening measurement only

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30" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w26h26 this guard fits almost any+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 26" OR 26" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 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