{"product_id":"oem-goodman-24-1-2-in-6-cell-heat-exchanger-for-gmnt120-5-4821404s","title":"OEM Goodman 24-1\/2 in 6-Cell Heat Exchanger for GMNT120-5 — 4821404S","description":"\u003cp\u003eThe Goodman \u003cstrong\u003e4821404S Heat Exchanger\u003c\/strong\u003e is a genuine OEM 24-1\/2 inch, 6-cell (clamshell) assembly for the \u003cstrong\u003eGMNT120-5\u003c\/strong\u003e 120,000 BTU gas furnace. The heat exchanger is the heart of the furnace — combustion gases pass through its cells while blower air flows across the exterior, transferring heat to your home while keeping toxic flue gases fully separated from breathable air. A cracked or corroded exchanger is a carbon monoxide hazard and must be replaced.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 6-cell clamshell heat exchanger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimension:\u003c\/strong\u003e 24-1\/2 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFurnace capacity:\u003c\/strong\u003e 120,000 BTU class (GMNT120-5)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminized steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Goodman\/Amana GMNT120-5\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine OEM 4821404S is dimensionally matched to the GMNT120-5 cabinet, burner rack, and inducer drafting. Because heat exchangers are a combustion-safety component, using the exact OEM part is essential — an ill-fitting generic can misalign burners, disturb draft, and create CO risk. Many Goodman furnaces also carry a limited lifetime heat-exchanger warranty; OEM parts preserve eligibility.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eProfessional installation required (advanced).\u003c\/strong\u003e This job involves gas disconnection, teardown of the burner assembly and blower deck, and post-install combustion testing. It should be performed by a licensed HVAC technician with proper CO testing equipment.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eCompatible with GMNT120-5. Confirm cabinet width and cell count before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058131616115,"sku":"GOODMAN-11748","price":433.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-24-1-2-in-6-cell-heat-exchanger-for-gmnt120-5-4821404s","provider":"National HVAC Parts","version":"1.0","type":"link"}