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The Goodman 4053501S Chimney Collar is a genuine OEM flue/vent component for the AMH80704BNAC furnace and related Goodman/Amana 80% AFUE units. The collar forms the transition between the furnace's induced-draft outlet and the vent pipe, keeping combustion byproducts sealed and correctly routed to the chimney. A warped or rusted collar risks flue-gas leakage and draft problems.
OEM collars match the exact diameter and mounting pattern of the induced-draft assembly, ensuring a leak-free seal. Universal collars may not seat properly, inviting carbon-monoxide leakage. Choose OEM for a safe, code-compliant vent connection.
Easy to Moderate — typically a bolt-on/screw-on replacement at the vent outlet. Plan 20–40 minutes. Verify a proper flue seal and always confirm safe venting after service.