{"product_id":"oem-lennox-heat-exchanger-assembly-98m81","title":"OEM Lennox Heat Exchanger Assembly — 98M81","description":"\u003cp\u003eGenuine OEM Lennox \u003cstrong\u003e98M81\u003c\/strong\u003e heat exchanger assembly. The heat exchanger is the heart of your Lennox gas furnace — it transfers heat from the burning fuel to the air circulating through your home while keeping combustion gases safely separated from that airstream. A properly functioning heat exchanger is essential for both efficient heating and safe operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Cracked or corroded heat exchangers often produce visible flame rollout or a flickering, distorted burner flame, unusual rumbling or clicking sounds during operation, soot buildup, and — most critically — elevated carbon monoxide readings that can trip your CO detector. Reduced heating output and rust flakes near the burners are also warning signs that the exchanger has failed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Heat exchangers are safety-critical components engineered to exact tolerances for your specific Lennox furnace model. This factory-original \u003cstrong\u003e98M81\u003c\/strong\u003e assembly is built to Lennox specifications for correct fit, proper gas-to-air separation, and rated combustion efficiency. Aftermarket substitutes risk improper sealing, premature cracking, and dangerous flue gas leakage. Choose OEM to protect your family and preserve any remaining manufacturer warranty coverage.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081066463603,"sku":"LNX-98M81","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-98m81","provider":"National HVAC Parts","version":"1.0","type":"link"}