{"product_id":"oem-lennox-heat-exchanger-assembly-13x42","title":"OEM Lennox Heat Exchanger Assembly — 13X42","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e13X42\u003c\/strong\u003e heat exchanger assembly (factory reference 612224-07) is the essential heat-transfer element in your Lennox gas furnace. It draws heat from the burner combustion and delivers it to the blower air stream, all while isolating hazardous flue gases from your indoor air. Engineered to precise Lennox tolerances, the \u003cstrong\u003e13X42\u003c\/strong\u003e restores safe, full-capacity heating and a leak-free combustion path.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon symptoms of a failing heat exchanger\u003c\/strong\u003e include cracks or splits in the metal, rust and corrosion, a wavering or yellow burner flame, soot buildup, unusual smells during heating, and increasing carbon monoxide readings. A compromised exchanger is a safety concern that warrants immediate replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e because the heat exchanger is a life-safety, combustion-critical part, its metallurgy, weld integrity, and dimensional accuracy cannot be compromised. The OEM \u003cstrong\u003e13X42\u003c\/strong\u003e is manufactured to Lennox standards for an exact fit to the burner assembly and collector box, maintaining certification, warranty, and long-term reliability. Non-OEM substitutes risk improper sealing, early failure, and dangerous flue-gas leakage.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081073508723,"sku":"LNX-13X42","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-13x42","provider":"National HVAC Parts","version":"1.0","type":"link"}