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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue-vent component engineered for the Goodman/Amana AMS81205DXAB 80% AFUE multi-position gas furnace. It forms the sealed lower transition between the furnace's induced-draft outlet and the vent connector, maintaining proper draft and preventing flue-gas leakage. Using the factory-spec part ensures the correct fit and combustion-safety clearances.
This is a true OEM Goodman component, dimensionally matched to the AMS81205DXAB heat-exchanger and vent geometry. Generic aftermarket transitions often require field modification and can compromise the vent seal. The OEM part installs with no rework and preserves your furnace's safety certification.
Easy–Moderate — a common HVAC service replacement. Shut off gas and power, remove the existing transition fasteners, seat the new part, and reseal the vent connector. Recommended for qualified HVAC technicians.