{"product_id":"oem-lennox-heat-exchanger-assembly-13x48","title":"OEM Lennox Heat Exchanger Assembly — 13X48","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e13X48\u003c\/strong\u003e heat exchanger assembly (factory reference 612224-07) is the primary heat-transfer component in your Lennox gas furnace. It captures heat from the burner flames and passes it to the circulating air while keeping combustion by-products safely contained and vented outdoors. Built to exacting Lennox specifications, the \u003cstrong\u003e13X48\u003c\/strong\u003e reestablishes rated heating performance and a properly sealed combustion path.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon symptoms of a failing heat exchanger\u003c\/strong\u003e include visible cracking, rust and scaling, a distorted or flickering burner flame, soot accumulation, odd odors when the furnace runs, and elevated carbon monoxide. Because a cracked exchanger can leak flue gas into living spaces, prompt replacement is essential.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the heat exchanger is a safety-critical part where alloy composition, weld strength, and precise fit determine both performance and protection. The OEM \u003cstrong\u003e13X48\u003c\/strong\u003e meets Lennox's engineering standards, mates correctly to the burner box and collector, and preserves combustion certification and warranty coverage. Aftermarket alternatives risk poor sealing, shortened life, and hazardous gas leakage.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081073475955,"sku":"LNX-13X48","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-13x48","provider":"National HVAC Parts","version":"1.0","type":"link"}