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The Goodman 0128F00006 is a genuine OEM chimney transition bottom designed as an exact-fit replacement for the WGFD28070V3BXAA gas furnace and compatible Goodman/Amana models. This sheet-metal transition channels flue products from the furnace heat exchanger into the vent connector, forming a sealed, correctly-shaped path that supports proper draft and safe venting of combustion byproducts.
As a factory OEM Goodman component, this transition is stamped to the precise dimensions and mounting hole pattern of your furnace cabinet. Generic aftermarket sheet metal rarely matches the flange geometry, leading to gaps, air leaks, and improper draft. The OEM part drops in without modification.
Easy to Moderate — Involves removing the old transition and fastening the replacement, then confirming a tight vent seal. A DIYer comfortable with sheet-metal fasteners can manage it; verify draft afterward.