{"product_id":"oem-goodman-45-burner-orifice-for-gsu100-4-furnace-b2589345","title":"OEM Goodman #45 Burner Orifice for GSU100-4 Furnace — B2589345","description":"\u003ch2\u003eOEM Goodman B2589345 Burner Orifice (#45 Drill Size)\u003c\/h2\u003e\u003cp\u003eThe Goodman B2589345 is a precision-machined natural gas burner orifice (spud) sized to drill #45, designed for the Goodman GSU100-4 gas furnace. The orifice meters the exact volume of gas delivered to each burner, setting the furnace's BTU input and combustion quality. A worn, corroded, or incorrectly sized orifice causes poor flame, delayed ignition, sooting, or reduced heat output. Replacing it with the correct OEM orifice restores clean, efficient combustion and correct manifold pressure.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart number: B2589345\u003c\/li\u003e\n\u003cli\u003eOrifice drill size: #45\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GSU100-4 gas furnace\u003c\/li\u003e\n\u003cli\u003eFuel: Natural gas\u003c\/li\u003e\n\u003cli\u003eThread: Standard Goodman burner spud thread\u003c\/li\u003e\n\u003cli\u003eMaterial: Machined brass\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOrifice sizing is critical to safe combustion. The OEM B2589345 guarantees the #45 bore Goodman specified for this furnace's BTU rating and altitude tuning. Generic orifices may have inconsistent bore tolerances that alter the gas rate — always verify size before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy to Moderate — basic hand tools.\u003c\/strong\u003e Requires shutting off gas, removing the manifold or burner assembly, and threading the new orifice in. Estimated time: 15–30 minutes per orifice. After installation, verify manifold pressure and flame appearance. Shut off gas and power before servicing.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058182963571,"sku":"GOODMAN-B2589345","price":13.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-45-burner-orifice-for-gsu100-4-furnace-b2589345","provider":"National HVAC Parts","version":"1.0","type":"link"}