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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue-vent component designed for the WGFM28115V5CXAB gas furnace and compatible Goodman/Amana models. This sheet-metal transition channels combustion byproducts from the furnace collector box into the vent connector, maintaining proper draft and a sealed flue path. A damaged, rusted, or missing transition can allow flue-gas leakage and poor venting.
This factory-original transition matches the exact dimensions and hole pattern of your furnace cabinet, ensuring a tight, correctly sealed vent connection. Generic or fabricated pieces rarely align perfectly and can create draft leaks. OEM guarantees a proper fit and safe venting.
Easy to Moderate — secured with sheet-metal screws and sealed at the joints. Basic hand tools and high-temp foil tape or approved sealant are recommended. Always shut off power and gas, and verify draft after installation. When in doubt, use a licensed HVAC technician.