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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue-venting component for the AMVC80704BXAB 80% AFUE furnace. This transition piece adapts the furnace's induced-draft outlet to the vent connector, directing combustion byproducts safely into the chimney or B-vent. A correctly fitted transition maintains proper draft and a sealed flue path, which is essential for safe operation and preventing flue-gas spillage into the living space.
OEM vs. Generic: Flue transitions are model-specific in their flange pattern, diameter, and depth. The Goodman OEM 0128F00006 matches the factory outlet exactly, so it seals and drafts as designed. Generic or fabricated substitutes risk leaks, poor draft, or improper fit around the inducer housing. For a venting part, OEM fit is worth it.
Install difficulty: Easy to moderate (2/5). Requires removing sheet-metal screws, reseating the transition, and re-sealing joints per code. Always cut power, inspect the existing vent for corrosion, and verify proper draft after installation. Improper venting is a carbon-monoxide hazard — use a qualified technician if unsure.