{"product_id":"oem-lennox-heat-exchanger-46k92","title":"OEM Lennox Heat Exchanger — 46K92","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e46K92\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 air supply. Precision-engineered to match Lennox furnace specifications, it ensures proper airflow, rated efficiency, and safe operation across compatible Lennox gas furnace models.\u003c\/p\u003e\u003cp\u003eA failing heat exchanger typically reveals itself through cracks, rust, or corrosion, unusual flame movement when the blower engages, soot buildup, or a lingering odor during operation. In many cases, a compromised heat exchanger will trip safety controls and prevent the furnace from firing. Because this part directly affects combustion safety, prompt replacement at the first sign of failure is critical.\u003c\/p\u003e\u003cp\u003eChoosing an OEM \u003cstrong\u003e46K92\u003c\/strong\u003e matters for Lennox equipment because factory-engineered heat exchangers are built to exact dimensional, metallurgical, and pressure tolerances. This guarantees a correct fit, preserves the furnace's AFUE efficiency rating, and maintains the integrity of Lennox's safety design — something aftermarket substitutes cannot reliably promise.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081132982643,"sku":"LNX-46K92","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-46K92.jpg?v=1783761901","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-46k92","provider":"National HVAC Parts","version":"1.0","type":"link"}