{"product_id":"oem-lennox-heat-exchanger-12k42","title":"OEM Lennox Heat Exchanger — 12K42","description":"\u003cp\u003eThe \u003cstrong\u003eLennox 12K42\u003c\/strong\u003e is a genuine OEM Heat Exchanger built to meet the exact specifications of compatible Lennox gas furnace systems, ensuring reliable and safe heat transfer from combustion gases to conditioned air. Signs of a failing heat exchanger include visible cracks, soot buildup, unusual odors, carbon monoxide detector alerts, or repeated tripping of the high-limit switch. Replacing with this authentic Lennox OEM component restores furnace safety, efficiency, and performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081063547251,"sku":"LNX-12K42","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-12k42","provider":"National HVAC Parts","version":"1.0","type":"link"}