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Duotone bay — asphalt brief on the left, yellow-folded service sheet on the right.
actual front end outer dimensions are approximately 16 5/8" width X 18 5/8" height
+ Product Details Size – 12"w X 12"h is the size for the duct opening measurement only
+ Product Details Size - 16"w X 14"h is the size for the duct opening measurement only
They seamlessly integrate into sheet rock plaster frame ceilings as well
actual front end outer dimensions are approximately 52 5/8" width X 22 5/8" height -
26" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 28" OR 28" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 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