{"product_id":"oem-lennox-stainless-heat-exchanger-480k-btu-13u55","title":"OEM Lennox Stainless Heat Exchanger 480K BTU — 13U55","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e13U55\u003c\/strong\u003e is a stainless steel heat exchanger assembly rated for 480,000 BTU applications, making it suited to large-capacity and commercial Lennox furnaces. This heat exchanger transfers combustion heat into the supply air while isolating flue gases from the conditioned airstream. Its stainless steel build is chosen for high-output units where sustained thermal cycling and corrosion resistance are essential.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Watch for visible cracking or corrosion, a burner flame that rolls out or disturbs when the blower starts, soot deposits, unexplained odors, and recurring high-limit or flame-sensor lockouts. In high-BTU equipment a degraded exchanger sharply reduces heating capacity and poses a carbon monoxide hazard, so prompt replacement is critical.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e At 480K BTU, exact tube geometry, alloy grade, and sealing surfaces are vital for safe, efficient combustion. The genuine Lennox \u003cstrong\u003e13U55\u003c\/strong\u003e is factory-matched to deliver correct fit, rated heat transfer, and safe flue containment while keeping your Lennox equipment within warranty. Aftermarket alternatives cannot guarantee these tolerances.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081077113203,"sku":"LNX-13U55","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-stainless-heat-exchanger-480k-btu-13u55","provider":"National HVAC Parts","version":"1.0","type":"link"}