{"product_id":"oem-lennox-stainless-steel-heat-exchanger-19a74","title":"OEM Lennox Stainless Steel Heat Exchanger — 19A74","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e19A74\u003c\/strong\u003e stainless steel heat exchanger assembly delivers the durability and corrosion resistance your Lennox furnace was designed around. Its stainless construction transfers combustion heat to your home's air stream efficiently while resisting the acidic condensate and thermal fatigue that shorten the life of lesser materials. This assembly keeps combustion gases isolated from your breathing air, making it a critical safety component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms\u003c\/strong\u003e include cracks, pinholes, or rust perforations in the exchanger, a burner flame that distorts when the blower starts, soot accumulation, unusual odors, and carbon monoxide alarms. Because a compromised exchanger can leak flue gases into your living space, replacement should never be delayed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The Lennox \u003cstrong\u003e19A74\u003c\/strong\u003e matches the exact stainless alloy, geometry, and mounting specifications of your original part. Aftermarket units frequently use thinner or inferior steel that warps and cracks under repeated heating cycles, jeopardizing safety and voiding your warranty. Installing the factory-correct OEM assembly ensures a precise fit, maximum efficiency, and long-term reliable heating.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081075442035,"sku":"LNX-19A74","price":399.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-stainless-steel-heat-exchanger-19a74","provider":"National HVAC Parts","version":"1.0","type":"link"}