{"product_id":"oem-lennox-heat-exchanger-assembly-r44723002-21w92","title":"OEM Lennox Heat Exchanger Assembly R44723002 — 21W92","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e21W92\u003c\/strong\u003e heat exchanger assembly (factory reference R44723002) is the essential heating and safety component of your Lennox gas furnace. It transfers combustion heat to the air stream moving through your system while sealing dangerous flue gases — including carbon monoxide — away from your home's indoor air. A furnace cannot operate safely or efficiently without an intact heat exchanger.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms\u003c\/strong\u003e include visible cracks, rust or corrosion, a burner flame that wavers or bends when the blower turns on, soot accumulation, odd smells during a heating cycle, and rising carbon monoxide levels. Because a failed exchanger is a serious health hazard, replacement should not be postponed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox builds the \u003cstrong\u003e21W92\u003c\/strong\u003e to the precise dimensions, material grade, and heat-transfer specs of your specific furnace model. Only the factory-original part assures proper fit, full combustion sealing, and continued warranty protection that generic alternatives cannot deliver. Installed by a licensed HVAC technician, this OEM assembly restores your Lennox furnace to safe, dependable, rated performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081073017203,"sku":"LNX-21W92","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-r44723002-21w92","provider":"National HVAC Parts","version":"1.0","type":"link"}