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The Goodman 0128F00006 chimney transition bottom is a genuine OEM flue/vent component for the WGFM28090V5CXAA gas furnace and related Goodman/Amana models. This transition piece forms the lower connection between the furnace's draft hood or collector box and the vent/chimney pipe, channeling combustion byproducts safely up the flue. A properly fitted, corrosion-free transition is critical to maintaining draft and preventing exhaust spillage into the living space.
Vent transitions are model-specific in their flange pattern and outlet diameter. The OEM 0128F00006 matches the furnace's collector box exactly, ensuring a leak-free seal and the correct vent cross-section. Fabricated or generic substitutes can misalign, leak flue gases, or restrict draft — a combustion-safety hazard. For flue components, OEM fit is the safest choice.
Rated Moderate. Requires shutting down the furnace, disconnecting the existing vent connector, removing screws or clips, and sealing the new transition to both the furnace outlet and the vent pipe. Draft and spillage must be verified after installation. Because improper venting risks carbon monoxide exposure, this work should be performed by a licensed HVAC professional and inspected per code.