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The Goodman 0128F00006 Chimney Transition Bottom is a genuine OEM flue/vent component for ACES801005CXAA gas furnaces. This transition piece directs combustion gases from the heat exchanger collector box into the vent connector, forming a sealed pathway to the chimney. A corroded or warped transition can leak flue products into the equipment space, so a properly fitted OEM part is critical for safe venting.
The OEM 0128F00006 is formed to mate exactly with the ACES801005CXAA collector box and vent. Generic or fabricated transitions risk poor seals and improper draft. For any flue-gas-carrying component, OEM fit is the safe choice.
Install Difficulty: Moderate (3/5). Requires removing the existing transition and resealing the flue connections. Shut off gas and power, and perform a combustion/draft check after installation. Professional installation recommended.