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The Goodman 0128F00006 chimney transition bottom is a genuine OEM flue-vent component for the AMH80905CXCB gas furnace and compatible Goodman/Amana models. This transition piece adapts the furnace's flue collar to the vent connector, channeling combustion byproducts from the heat exchanger into the venting system while maintaining proper draft. A correct, well-sealed transition is critical for safely evacuating flue gases and preventing carbon-monoxide spillage into the living space.
The OEM 0128F00006 matches the original flue-collar diameter and flange pattern for a leak-free, code-compliant fit. Generic transitions may require modification and can compromise the draft or seal. Because this part directly affects safe flue-gas evacuation, we recommend the OEM component.
Moderate. Turn off the furnace, remove the existing transition fasteners, seat the new bottom against the flue collar, and secure with sheet-metal screws and high-temp sealant as required. About 30 minutes. After install, verify proper draft and test for spillage at the draft hood; when in doubt, have a licensed technician confirm safe venting.