{"product_id":"oem-lennox-heat-exchanger-assembly-13x39","title":"OEM Lennox Heat Exchanger Assembly — 13X39","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e13X39\u003c\/strong\u003e heat exchanger assembly (factory reference 612218-45) is the essential furnace part that transfers combustion heat to your home's circulating air while containing flue gases and preventing them from entering the living space. Built to precise Lennox specifications, it delivers the correct fit, airflow, and safe, efficient heat transfer your furnace was designed for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Common warning signs include visible cracks or rust, a wavering or discolored burner flame, soot accumulation, unusual odors during operation, or a carbon monoxide detector alarm. A cracked or corroded heat exchanger poses a serious safety risk and should be replaced without delay.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Heat exchangers are safety-critical, making the exact-fit OEM Lennox \u003cstrong\u003e13X39\u003c\/strong\u003e the only reliable choice. Generic substitutes may not match Lennox metal gauge, weld patterns, or dimensions, leading to improper combustion, premature failure, and voided warranties. This factory assembly restores your Lennox furnace to rated efficiency and safe, dependable heating.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081075999091,"sku":"LNX-13X39","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-13x39","provider":"National HVAC Parts","version":"1.0","type":"link"}