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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM venting component for the AMH80804BXBB 80% AFUE gas furnace. This transition piece connects the furnace's induced-draft outlet to the flue/chimney venting, forming the correctly sized and sealed pathway that routes combustion byproducts safely out of the home.
Because venting geometry affects draft and combustion safety, the OEM 0128F00006 is dimensioned to mate exactly with this furnace's draft outlet and cabinet. Fabricated or generic substitutes risk gaps and misalignment that can cause flue-gas leakage. For any exhaust component, genuine OEM is strongly recommended.
Easy (1/5). Removes and reinstalls with a few screws; re-seal all joints per code. Because this handles combustion exhaust, verify proper draft and confirm no flue-gas spillage after installation — when in doubt, have a licensed HVAC technician inspect the venting.