{"product_id":"oem-lennox-gas-burner-assembly-11m64","title":"OEM Lennox Gas Burner Assembly — 11M64","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e11M64\u003c\/strong\u003e gas burner box assembly (factory reference LB-66722) delivers metered fuel to the combustion chamber of your Lennox gas furnace, mixing gas and air for a stable, efficient flame that heats the heat exchanger. As a factory-engineered component, it is machined to the exact port spacing and gas orifice alignment your specific Lennox furnace was designed around, ensuring proper flame carryover across every burner.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When a burner assembly is corroded, cracked, or fouled you may notice delayed or rough ignition, noticeable flame rollout, yellow or lazy flames instead of crisp blue, sooting, unusual burning odors, or the furnace repeatedly locking out on the flame-sensing safety circuit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Combustion components are safety-critical. Aftermarket burners often differ in port geometry and material grade, which can cause uneven flame patterns, poor flame-sense signal, and dangerous incomplete combustion. Choosing the OEM Lennox \u003cstrong\u003e11M64\u003c\/strong\u003e guarantees correct fit, rated BTU input, and the clean, quiet combustion your Lennox equipment was certified to deliver — protecting both efficiency and safe operation.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081123676531,"sku":"LNX-11M64","price":49.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-burner-ribbon-LNX-11M64.jpg?v=1783761178","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-gas-burner-assembly-11m64","provider":"National HVAC Parts","version":"1.0","type":"link"}