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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent component that adapts the furnace heat exchanger outlet to the chimney or vent connector on the ACEC801005CXAA and other compatible Goodman/Amana gas furnaces. This sheet-metal transition channels hot combustion gases safely from the furnace into the venting system, maintaining proper draft and a sealed exhaust path.
The OEM transition is stamped to match the furnace cabinet and vent connector dimensions exactly, so it seals without gaps or field fabrication. Generic sheet-metal substitutes usually require cutting, crimping, and extra sealant, and a poor fit risks flue-gas leakage. The OEM 0128F00006 drops in for a clean, code-compliant exhaust path.
Easy to Moderate. The transition is typically secured with sheet-metal screws once the old piece is removed. Power and gas should be off during service, and all flue joints must be sealed and draft-tested afterward. Because it carries combustion gases, verify proper draft before returning the unit to service.