{"product_id":"oem-lennox-heat-exchanger-assembly-33m12","title":"OEM Lennox Heat Exchanger Assembly — 33M12","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e33M12\u003c\/strong\u003e heat exchanger assembly moves combustion heat into the air circulating through your Lennox gas furnace while keeping harmful flue gases safely contained. Engineered to Lennox factory specifications, it re-establishes the rated heating capacity and thermal efficiency your system was designed to achieve.\u003c\/p\u003e\u003cp\u003eTelltale symptoms of a failing heat exchanger include cracks, rust, or scorching on the metal, a burner flame that turns yellow or flickers, soot deposits, unusual expansion-and-contraction noises during operation, and detectable carbon monoxide. These conditions signal an unsafe unit that requires immediate replacement to protect your household.\u003c\/p\u003e\u003cp\u003eChoosing the OEM \u003cstrong\u003e33M12\u003c\/strong\u003e guarantees exact dimensional fit and combustion performance tuned specifically for your Lennox furnace. Aftermarket substitutes often introduce fit problems, airflow disruption, and warranty complications. Genuine Lennox parts uphold the safety, efficiency, and longevity standards built into your original equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081072329075,"sku":"LNX-33M12","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-33m12","provider":"National HVAC Parts","version":"1.0","type":"link"}