{"product_id":"oem-lennox-stainless-steel-heat-exchanger-19a78","title":"OEM Lennox Stainless Steel Heat Exchanger — 19A78","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e19A78\u003c\/strong\u003e is a stainless steel heat exchanger assembly built for long-life, corrosion-resistant performance in your Lennox gas furnace. As combustion gases flow through the sealed internal passages, your blower pushes household air across the exterior — the exchanger transfers that heat into your home while keeping flue gases completely isolated from the air you breathe. Stainless construction resists the acidic condensate that forms in high-efficiency and secondary heat transfer applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e watch for a distorted or flickering burner flame, rust or scale flaking into the burner box, a burnt or metallic smell during operation, unexplained carbon monoxide alarms, or repeated flame-rollout or limit-switch trips. A visibly cracked, warped, or perforated exchanger should be taken out of service right away because of the CO risk.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the \u003cstrong\u003e19A78\u003c\/strong\u003e is dimensioned to your furnace's exact burner count, gas input rating, and cabinet layout. A genuine Lennox exchanger restores factory heat rise and combustion safety, keeps your equipment listing and warranty valid, and ensures a bolt-in fit — generic replacements risk airflow and combustion mismatches that shorten furnace life.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081076392307,"sku":"LNX-19A78","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-stainless-steel-heat-exchanger-19a78","provider":"National HVAC Parts","version":"1.0","type":"link"}