{"product_id":"oem-lennox-stainless-steel-heat-exchanger-assembly-57w86","title":"OEM Lennox Stainless Steel Heat Exchanger Assembly — 57W86","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e57W86\u003c\/strong\u003e is a stainless steel heat exchanger assembly, the core heating component that transfers combustion heat to the air circulating through your furnace while keeping toxic flue gases safely separated from your home's air supply. Its stainless steel construction resists corrosion and thermal fatigue for long service life in demanding Lennox gas furnace applications.\u003c\/p\u003e\u003cp\u003eCommon symptoms of a failing heat exchanger include visible cracks or rust, a flickering or rolling burner flame, soot buildup, unusual odors, and — most critically — elevated carbon monoxide readings. A cracked heat exchanger is a safety hazard and should be replaced immediately.\u003c\/p\u003e\u003cp\u003eChoosing the OEM Lennox \u003cstrong\u003e57W86\u003c\/strong\u003e matters because heat exchangers are engineered to exact tolerances for your furnace's specific burner geometry, airflow, and firing rate. Aftermarket substitutes risk improper fit, poor heat transfer, and compromised combustion safety. This factory assembly guarantees correct fit, rated efficiency, and warranty compliance for your Lennox equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081066627443,"sku":"LNX-57W86","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-stainless-steel-heat-exchanger-assembly-57w86","provider":"National HVAC Parts","version":"1.0","type":"link"}