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The Goodman 0128F00006 is a genuine OEM chimney transition bottom for the AMS81005CXAA gas furnace and compatible Goodman and Amana models. This sheet-metal vent component adapts the furnace's induced-draft outlet to the flue collar, forming a properly sized, sealed pathway for combustion byproducts to exit into the vent system. Correct transition geometry maintains draft, prevents flue-gas spillage, and keeps the venting code-compliant.
Vent transitions are cut to exact dimensions for the furnace cabinet and flue collar. An OEM 0128F00006 drops in with the correct clearances and screw pattern, ensuring a leak-free seal. Fabricated or generic substitutes rarely match the flange geometry, risking flue-gas leakage — a carbon monoxide hazard. Use the OEM part for safe venting.
Moderate (2/5). Secured with sheet-metal screws and sealed at the joints. Cut power before servicing, seal seams with approved high-temp materials, and verify proper draft after installation. If unsure about vent integrity, have a licensed technician confirm the system.