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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue-vent component engineered for the Goodman VDS80804BNAA furnace and compatible 80% AFUE gas furnace platforms. This transition piece forms the lower connection between the furnace flue collar and the vent pipe, directing combustion byproducts safely toward the chimney or vent termination. A precise factory fit is critical here — an incorrect or ill-fitting transition can allow flue-gas leakage, so an exact OEM replacement is the safest choice.
Unlike universal transition fittings that require field cutting and sealing, this factory OEM part is dimensionally matched to the VDS80804BNAA vent collar for a leak-tight, code-compliant seat. Generic aftermarket adapters often need gasketing or crimping to fit and can compromise draft performance.
Moderate. Requires shutting off gas and power, disconnecting the existing vent connection, and resealing per local code. Best performed by an HVAC technician; typical replacement time is 20–40 minutes.
Every part is inspected for correct fit before shipping. Backed by our fitment guarantee for the VDS80804BNAA and listed compatible Goodman models.