{"product_id":"oem-lennox-heat-exchanger-lb-79081x-54k42","title":"OEM Lennox Heat Exchanger LB-79081X — 54K42","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e54K42\u003c\/strong\u003e heat exchanger component (factory reference LB-79081X) is a precision-engineered part for your Lennox furnace's combustion system. It plays a direct role in transferring burner heat into the circulating air while helping keep flue gases safely separated from your home's air supply. Using the correct factory part protects both the efficiency and the safe operation of your equipment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e visible cracking, corrosion, or warping, an erratic or yellow-tipped burner flame, soot accumulation, unusual ignition noises, odd smells during heating, or a carbon monoxide detector warning. Signs of a compromised heat exchanger call for prompt replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the \u003cstrong\u003e54K42\u003c\/strong\u003e is manufactured to the exact specification, materials, and dimensions Lennox designed for your unit. Generic alternatives may not seal or fit correctly, undermining heat transfer and long-term reliability. The genuine OEM part guarantees correct fit, rated performance, and dependable service life.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081065415027,"sku":"LNX-54K42","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-lb-79081x-54k42","provider":"National HVAC Parts","version":"1.0","type":"link"}