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The Goodman 0128F00006 is a genuine OEM chimney transition bottom for the VMS81005CXAA gas furnace and compatible Goodman/Amana models. This sheet-metal transition channels flue gases from the furnace vent collar into the chimney or vent connector, maintaining proper draft and a sealed flue path. A rusted, warped, or missing transition can allow flue-gas spillage and disrupt venting — replacing it keeps combustion byproducts safely routed to the outdoors.
This genuine OEM Goodman transition is stamped to match the furnace's exact vent-collar dimensions and mounting pattern. Universal or fabricated transitions rarely seal cleanly and can create draft leaks. For a flue component, OEM ensures a proper fit and code-compliant venting.
Easy — remove the fasteners securing the old transition, clear any debris, and mount the replacement with the supplied hardware. Seal joints per local code and confirm proper draft after installation.