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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue-vent component engineered for the AMH80604BNBB 80% AFUE gas furnace. This transition piece forms the sealed connection between the furnace flue collar and the vent chimney, directing combustion byproducts safely out of the home. A correct-fitting transition is essential for proper draft and to prevent flue-gas leakage.
This is the factory-original Goodman part, guaranteed to match the flue collar dimensions of your furnace exactly. Generic transitions often require field trimming and can compromise the vent seal. Choose OEM for a leak-tight, code-compliant fit.
Moderate — Best handled by an HVAC professional. Requires furnace shutdown, removal of the existing flue transition, and resealing of the vent connection. Always verify proper draft after service.