{"product_id":"oem-lennox-heat-exchanger-assembly-76m63","title":"OEM Lennox Heat Exchanger Assembly — 76M63","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e76M63\u003c\/strong\u003e heat exchanger assembly is the core component that transfers heat from the combustion process to the air circulating through your furnace, all while keeping combustion gases safely separated from your home's air supply. This factory part is engineered to the exact tolerances, alloy specifications, and pressure ratings of your Lennox furnace, ensuring reliable performance season after season.\u003c\/p\u003e\u003cp\u003eA failing heat exchanger often reveals itself through cracks, rust or scaling, a flickering or rolling burner flame, soot buildup, or unusual odors during operation. Because a compromised heat exchanger can allow carbon monoxide to enter the airstream, it is a safety-critical part that should be replaced promptly with a properly matched unit.\u003c\/p\u003e\u003cp\u003eChoosing OEM matters for Lennox equipment. Aftermarket heat exchangers may differ in metal thickness, weld quality, and dimensional fit, which can lead to premature failure, poor heat transfer, and voided warranties. The Lennox \u003cstrong\u003e76M63\u003c\/strong\u003e is a direct factory replacement that drops in without modification and restores your system to its rated efficiency and safety standards.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081074393459,"sku":"LNX-76M63","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-76m63","provider":"National HVAC Parts","version":"1.0","type":"link"}