{"product_id":"oem-lennox-burner-box-61m74","title":"OEM Lennox Burner Box — 61M74","description":"\u003cp\u003eThe Lennox \u003cstrong\u003e61M74\u003c\/strong\u003e (factory reference LB-95152) is a genuine OEM burner box designed for Lennox gas furnaces. The burner box houses and positions the burners, shielding the combustion process and directing the air-fuel mixture into the heat exchanger for efficient, contained combustion. Its precise geometry supports proper flame containment, airflow, and safe venting of combustion byproducts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A damaged or corroded burner box can lead to misaligned burners, unstable or rolling flames, flame rollout trips, rust and scale flaking into the combustion area, or compromised heat exchanger protection. If you see signs of overheating, warping, or corrosion around the burner compartment, the burner box should be replaced to maintain safe operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The Lennox \u003cstrong\u003e61M74\u003c\/strong\u003e is manufactured to exact factory dimensions so burners, igniter, and flame sensor seat correctly and airflow matches the furnace's design. Aftermarket housings can misalign critical components, disrupt combustion, and void your warranty. The genuine \u003cstrong\u003e61M74\u003c\/strong\u003e ensures correct fit, safe flame containment, and reliable performance for your Lennox furnace.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081129247091,"sku":"LNX-61M74","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-61M74.jpg?v=1783759584","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-burner-box-61m74","provider":"National HVAC Parts","version":"1.0","type":"link"}