{"product_id":"oem-lennox-heat-exchanger-assembly-13x49","title":"OEM Lennox Heat Exchanger Assembly — 13X49","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e13X49\u003c\/strong\u003e heat exchanger assembly (factory references 614580-41 and 612993-04) is the core combustion component that transfers heat from the burner flames to the air moving through your furnace, all while keeping toxic combustion gases sealed away from your home's airstream. It is engineered to the exact metallurgy, tube geometry, and mounting dimensions of the Lennox furnace models it serves, ensuring correct heat transfer and airflow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms\u003c\/strong\u003e include visible cracks or rust-through in the exchanger tubes, a flickering or rolling burner flame, soot or corrosion buildup, unusual odors, and repeated safety-limit or flame-sensor lockouts. A compromised heat exchanger can allow carbon monoxide to escape, so replacement should never be delayed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e a genuine Lennox \u003cstrong\u003e13X49\u003c\/strong\u003e assembly meets the original pressure, thermal-cycling, and safety-certification specifications for your unit. Aftermarket or universal exchangers risk improper fit, reduced efficiency, premature cracking, and voided warranty coverage. Choosing the OEM part protects both your furnace's rated performance and your family's safety.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081075048819,"sku":"LNX-13X49","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-13x49","provider":"National HVAC Parts","version":"1.0","type":"link"}