{"product_id":"oem-lennox-heat-exchanger-kit-dunkirk-550002274-y5343","title":"OEM Lennox Heat Exchanger Kit (Dunkirk 550002274) — Y5343","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003eY5343\u003c\/strong\u003e heat exchanger kit (cross-references to Dunkirk part 550002274) is a complete factory replacement for compatible Lennox and Dunkirk-built heating equipment. The heat exchanger transfers combustion heat into the circulating air or water loop while sealing hazardous flue gases away from the living space — making it one of the most safety-critical components in the system. This kit includes the exchanger assembly and associated hardware for a proper installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e cracks, pinholes, or corrosion in the exchanger, an unstable yellow flame, soot buildup, rumbling or banging at startup, unusual odors, and carbon monoxide alarms. A failed exchanger is a safety hazard requiring prompt replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The OEM \u003cstrong\u003eY5343\u003c\/strong\u003e kit is engineered to the precise metallurgy, dimensions, and pressure ratings specified for your Lennox\/Dunkirk unit. That exact match restores rated efficiency, ensures a leak-free seal, and protects your equipment warranty — assurances aftermarket parts cannot reliably provide.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081077309811,"sku":"LNX-Y5343","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-kit-dunkirk-550002274-y5343","provider":"National HVAC Parts","version":"1.0","type":"link"}