{"product_id":"oem-lennox-heat-exchanger-15w85","title":"OEM Lennox Heat Exchanger — 15W85","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e15W85\u003c\/strong\u003e heat exchanger is the core component that transfers combustion heat to the air moving through your furnace while keeping flue gases safely separated from your home's airflow. Engineered to exact Lennox specifications, it restores rated heating capacity and preserves the safety barrier your furnace depends on.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing heat exchanger often shows up as visible cracks or rust, soot buildup, a flickering or off-color burner flame, unusual odors, or a carbon monoxide detector alarm. Reduced heat output and short-cycling can also signal that the exchanger has degraded and needs replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The heat exchanger is a safety-critical part. A genuine Lennox \u003cstrong\u003e15W85\u003c\/strong\u003e is manufactured from the correct alloy and to the precise dimensions of your unit, ensuring a proper seal, correct thermal expansion behavior, and full compatibility with your furnace's burner and blower system. Aftermarket substitutes risk improper fit and compromised combustion containment — never worth the gamble on a component tied to combustion safety.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081145205107,"sku":"LNX-15W85","price":399.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-heat-exchanger-LNX-15W85.jpg?v=1783761893","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-15w85","provider":"National HVAC Parts","version":"1.0","type":"link"}