{"product_id":"oem-lennox-heat-exchanger-assembly-14k78","title":"OEM Lennox Heat Exchanger Assembly — 14K78","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e14K78\u003c\/strong\u003e heat exchanger assembly (also referenced as 614580-54 and 613000-12) is the primary combustion chamber that transfers heat to your home's air while containing flue gases and byproducts. Built to Lennox factory specifications, this assembly delivers the precise fit, sealing, and heat-transfer surface your furnace was designed around for safe, efficient operation.\u003c\/p\u003e\u003cp\u003eWhen a heat exchanger deteriorates, you may notice cracks or corrosion, a yellow or wavering burner flame, soot, strange smells, or short-cycling. A compromised exchanger can allow carbon monoxide to mix with your heated air, making prompt replacement essential for your family's safety.\u003c\/p\u003e\u003cp\u003eInstalling an OEM Lennox \u003cstrong\u003e14K78\u003c\/strong\u003e is critical because this is a safety component with tight dimensional and metallurgical requirements. Non-genuine parts risk improper sealing, premature cracking under thermal stress, and flue-gas leakage. The authentic assembly restores rated performance, maintains combustion integrity, and protects your furnace warranty.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081073082739,"sku":"LNX-14K78","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-14k78","provider":"National HVAC Parts","version":"1.0","type":"link"}