{"product_id":"oem-lennox-heat-exchanger-assembly-612222-44-13x37","title":"OEM Lennox Heat Exchanger Assembly 612222-44 — 13X37","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e13X37\u003c\/strong\u003e heat exchanger assembly (factory reference 612222-44) is the central combustion component of your Lennox gas furnace. It moves heat from the burner flames into the supply air while maintaining an airtight barrier that keeps flue gases out of your home's air stream. As both a performance and a safety part, it is one of the most vital pieces in the furnace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Look for cracked or corroded surfaces, a flame that wavers or rolls out, soot buildup, a burning or metallic odor during heating cycles, or a carbon monoxide alarm. Diminished heating capacity and recurring high-limit shutdowns are additional indicators that the exchanger needs replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e A heat exchanger has to match the original furnace precisely in dimensions, alloy, and gas path. The OEM Lennox \u003cstrong\u003e13X37\u003c\/strong\u003e is produced to factory specifications, ensuring a proper seal, efficient heat transfer, and safe combustion in your Lennox equipment. Non-OEM parts can fit poorly and risk dangerous gas leaks. Install the genuine \u003cstrong\u003e13X37\u003c\/strong\u003e for a safe and dependable repair.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081073836403,"sku":"LNX-13X37","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-assembly-612222-44-13x37","provider":"National HVAC Parts","version":"1.0","type":"link"}