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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent component for the Goodman/Amana ADVC80905CXAA gas furnace. It forms the sealed lower transition between the furnace flue collar and the venting system, directing combustion byproducts safely into the chimney or vent connector.
This genuine OEM transition is stamped to match the exact flue-collar geometry of your furnace, ensuring a leak-tight fit and proper draft. Universal or fabricated substitutes risk flue-gas leakage and draft problems that can trigger safety lockouts. OEM guarantees correct alignment and sealing.
Moderate — Involves removing the existing vent transition, seating and sealing the replacement, and verifying draft. Combustion-venting work should be performed or inspected by a licensed HVAC technician.