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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM venting component that connects the furnace's induced-draft/flue outlet to the chimney or vent run on the ADVC80805CXBA furnace and compatible Goodman/Amana models. This transition piece channels combustion byproducts safely out of the appliance, so proper fit and sealing are critical to prevent flue-gas leakage and maintain correct draft. Rusted, warped, or ill-fitting transitions can cause venting problems and safety concerns.
The OEM transition is stamped to the exact outlet dimensions and mounting pattern of the furnace, giving a leak-free, properly aligned connection. Generic or fabricated transitions risk gaps and improper draft that can allow flue-gas spillage. For a venting component, the factory-exact part is the responsible choice.
Moderate. Involves accessing the flue/draft outlet, fitting the transition, and sealing per code. Because it handles combustion gases, installation and a draft/spillage check should be performed by a licensed HVAC technician. Disconnect power before service.