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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM venting component for the Goodman/Amana ADVC81005CXBB furnace. This transition piece seats at the base of the flue/chimney assembly, directing combustion byproducts from the heat exchanger into the vent connector while maintaining the correct draft geometry the furnace was engineered around. A properly fitted transition is essential for safe, code-compliant venting and efficient combustion.
This genuine Goodman OEM transition matches the exact stamping, dimensions, and gasket points of the original, ensuring a leak-free seal. Generic or shop-fabricated pieces risk flue gas leakage and draft problems — an unacceptable safety risk on any gas appliance. Choose OEM for a guaranteed fit.
Moderate (3/5). Requires partial disassembly of the vent connection and careful re-sealing. Plan 30–45 minutes with basic hand tools. Because it involves the combustion venting path, a licensed HVAC technician should verify draft and check for spillage after installation.
Disconnect power and gas before servicing. Professional installation is strongly recommended for venting components.