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The Goodman 0128F00006 is a genuine OEM chimney transition bottom — a flue/vent component for the ACEC800805CXAB gas furnace and compatible Goodman/Amana 80% AFUE models. This sheet-metal transition connects the furnace's draft hood or induced-draft outlet to the vent connector, channeling combustion byproducts toward the chimney. A correctly fitted transition maintains proper draft and a sealed flue path, which is essential for safe venting and protection against carbon-monoxide spillage.
Venting geometry matters. The OEM 0128F00006 matches the exact flange and outlet dimensions of your furnace, ensuring a tight, gap-free connection. A generic or fabricated transition may not seal correctly, risking flue-gas leakage and improper draft. For any combustion-venting part, OEM fit is worth the small premium.
Difficulty: Moderate. Remove the old transition, fit the replacement, and secure with sheet-metal screws and high-temp foil tape or approved sealant. Verify proper draft with the furnace running. Plan for 20–30 minutes. Always confirm there is no flue-gas spillage at the draft hood after install.