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The Goodman 0128F00006 is a genuine OEM chimney transition bottom that connects the furnace's induced-draft outlet to the vent/flue system on the ADSH800804BXAB gas furnace. This sheet-metal transition ensures a proper, leak-free path for combustion byproducts, maintaining correct draft and keeping flue gases safely routed out of the home.
The OEM transition is stamped to the exact dimensions of your furnace's flue collar and cabinet opening, so it seats cleanly without gaps. Generic or field-fabricated transitions risk flue-gas leakage and improper draft — a carbon monoxide hazard. OEM fit is the safe choice for any venting component.
Moderate (3/5). Involves removing and resealing flue connections. Use approved high-temp sealant/screws and verify draft after install. Because this handles combustion gases, professional installation is recommended.