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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent component for the ACES800603ANAA furnace and compatible Goodman/Amana models. This transition piece couples the furnace's flue collector to the vent connector, channeling combustion byproducts toward the chimney or vent system. A properly fitted transition is essential for correct draft, safe venting of carbon monoxide, and meeting clearance and code requirements.
This genuine Goodman OEM transition is stamped to the exact dimensions and gauge of the original, so it seals cleanly to the flue collector and vent pipe. Generic or fabricated substitutes risk gaps, leaks, and improper draft — a serious combustion-safety concern. OEM fit is the safe choice for any venting component.
Moderate (3/5). Requires removing the existing transition, sealing the new piece with high-temp sealant or approved tape, and re-securing fasteners. Always perform a draft/spillage and combustion check after reassembly. If unsure, have a licensed HVAC technician verify the venting.