{"product_id":"oem-lennox-heat-exchanger-assembly-14k79","title":"OEM Lennox Heat Exchanger Assembly — 14K79","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e14K79\u003c\/strong\u003e heat exchanger assembly — cross-referenced to Lennox part number 613000-03 — transfers combustion heat to the air circulated by your furnace's blower while forming a sealed boundary that prevents flue gases from mixing with your indoor air. Built to Lennox factory specifications, it delivers the fit, durability, and thermal performance your furnace was designed around.\u003c\/p\u003e\u003cp\u003eWatch for symptoms of heat exchanger failure such as visible cracking, corrosion or rust flakes, a burner flame that wavers when the blower turns on, soot buildup, odd odors, or a carbon monoxide alarm. Since a breached heat exchanger poses a serious CO safety hazard, prompt replacement with a correctly matched part is essential.\u003c\/p\u003e\u003cp\u003eUsing an OEM part protects both safety and efficiency. The Lennox \u003cstrong\u003e14K79\u003c\/strong\u003e reproduces the original's precise dimensions, alloy, and weld integrity for a bolt-in replacement that maintains proper clearances and rated output. Aftermarket alternatives risk fit issues, uneven heating, and shortened lifespan on this critical component.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081074491763,"sku":"LNX-14K79","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-14k79","provider":"National HVAC Parts","version":"1.0","type":"link"}