{"product_id":"oem-lennox-heat-exchanger-99w42","title":"OEM Lennox Heat Exchanger — 99W42","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e99W42\u003c\/strong\u003e heat exchanger is the core heating component of your Lennox gas furnace, transferring heat from the combustion gases to the circulating air while keeping those flue gases safely separated from your home's air supply. It is manufactured to Lennox's exact metallurgy and tolerances for a correct, safe fit.\u003c\/p\u003e\u003cp\u003eA compromised heat exchanger often reveals itself through visible cracks or rust, a flickering or rolling burner flame, soot buildup, unusual odors, or an elevated carbon monoxide reading. Because a breached exchanger can allow combustion byproducts to mix with your indoor air, this is a safety-critical part that should be replaced promptly by a qualified technician.\u003c\/p\u003e\u003cp\u003eOEM is essential here: Lennox designs the \u003cstrong\u003e99W42\u003c\/strong\u003e with specific alloys, thickness, and geometry to withstand thermal cycling and maintain a sealed combustion path over the life of the furnace. Generic substitutes risk poor fit, premature cracking, and safety hazards. This authentic Lennox heat exchanger restores efficient, reliable, and safe heating for your equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081138717043,"sku":"LNX-99W42","price":399.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-heat-exchanger-LNX-99W42.jpg?v=1783761919","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-heat-exchanger-99w42","provider":"National HVAC Parts","version":"1.0","type":"link"}