{"product_id":"oem-lennox-heat-exchanger-assembly-613000-05-14k81","title":"OEM Lennox Heat Exchanger Assembly 613000-05 — 14K81","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e14K81\u003c\/strong\u003e heat exchanger assembly (factory references 614580-57 and 613000-05) is the essential heat-transfer component of your Lennox gas furnace. It draws heat from the burner combustion and releases it into the circulating air stream, warming your home while keeping combustion gases sealed off and safely vented. Its multi-pass design maximizes surface area for strong, efficient heating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms\u003c\/strong\u003e include cracks, rust, or perforations in the exchanger walls, a burner flame that flickers or lifts when the blower starts, soot or scorch marks, foul odors during heating, condensation pooling near the furnace, or a carbon monoxide alarm activation. Any of these signs calls for immediate replacement to protect indoor air safety.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e14K81\u003c\/strong\u003e is produced to Lennox's exact specifications for dimensions, metal composition, and thermal tolerance, ensuring a leak-free seal and full rated efficiency. Aftermarket parts risk poor sealing, diminished performance, and early failure. The authentic OEM assembly delivers a precise fit and preserves your furnace's factory safety certification. Installation should be handled by a licensed HVAC technician.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081076294003,"sku":"LNX-14K81","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-613000-05-14k81","provider":"National HVAC Parts","version":"1.0","type":"link"}