{"product_id":"oem-lennox-heat-exchanger-assembly-16u74","title":"OEM Lennox Heat Exchanger Assembly — 16U74","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e16U74\u003c\/strong\u003e heat exchanger assembly is the key heat-transfer element of your Lennox furnace. As hot combustion gases move through its chambers, it warms the circulating air delivered to your living space while keeping exhaust and carbon monoxide fully contained and vented outdoors. Built to Lennox factory specifications, this assembly is a direct, exact-fit replacement engineered for your equipment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Be alert for visible cracks or rust, a distorted or yellow burner flame, soot and scorch marks, unusual smells during heating, or a noticeable drop in comfort and efficiency. A cracked heat exchanger can allow carbon monoxide to escape, making immediate replacement critical.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Because the heat exchanger is safety-critical, it must match your furnace's combustion and airflow design precisely. The OEM \u003cstrong\u003e16U74\u003c\/strong\u003e ensures proper fit, reliable flame containment, and Lennox-rated heating efficiency — protecting your equipment warranty and household safety where aftermarket parts cannot be trusted.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081071542643,"sku":"LNX-16U74","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-16u74","provider":"National HVAC Parts","version":"1.0","type":"link"}