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The Goodman 4053501S Chimney Collar is the genuine OEM flue vent connector for the Amana/Goodman AMH80704BNAA 80% AFUE furnace. The collar seals the transition between the furnace vent outlet and the B-vent or chimney connector, ensuring proper draft and safe flue-gas evacuation. A corroded or ill-fitting collar can leak combustion byproducts — a safety-critical replacement.
The OEM collar matches the AMH80704BNAA vent outlet diameter and mounting hole pattern exactly, so it seats flush and seals against draft leaks. Universal collars may not align, risking backdraft. For any flue-gas component, OEM fit is the responsible choice.
Easy. Remove the vent connector, unfasten the old collar, seat the new one, and reattach the vent with proper clearances and sheet-metal screws. After install, verify draft and check for spillage at the draft hood.
Fit-guaranteed for the AMH80704BNAA. Contact info@nationalhvacparts.com with questions.