{"product_id":"oem-lennox-stainless-steel-heat-exchanger-57w85","title":"OEM Lennox Stainless Steel Heat Exchanger — 57W85","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e57W85\u003c\/strong\u003e stainless steel heat exchanger assembly delivers durable, corrosion-resistant heat transfer for your Lennox gas furnace. Its stainless construction resists the acidic condensate and thermal stress that shorten the life of standard steel exchangers, making it ideal for high-efficiency and condensing furnace applications. Every unit is built to factory specifications for exact burner alignment and safe combustion separation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Watch for cracks, rust streaks, or perforations in the exchanger walls, a distorted or lifting burner flame, soot accumulation, strange smells during heating cycles, or a carbon monoxide alarm activating when the furnace fires. Any of these signs indicates the heat exchanger should be replaced without delay.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The stainless alloy, weld pattern, and flue geometry of the \u003cstrong\u003e57W85\u003c\/strong\u003e are matched precisely to your Lennox furnace. Generic replacements can compromise combustion safety, void warranties, and fail prematurely. Choosing the genuine OEM assembly guarantees correct fit, rated efficiency, and reliable protection against combustion gas leaks. In stock and ready to ship same day.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081065120115,"sku":"LNX-57W85","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-stainless-steel-heat-exchanger-57w85","provider":"National HVAC Parts","version":"1.0","type":"link"}