{"product_id":"nordyne-661055r-orifice","title":"Nordyne 661055R Orifice","description":"\u003cp\u003eThe \u003cstrong\u003eNordyne 661055R Orifice\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003e#55 drill main burner orifice\u003c\/strong\u003e designed to maintain consistent manifold pressure and gas flow in high-efficiency heating systems. As a veteran HVACR technician knows, precise gas metering is critical for achieving a clean \u003cstrong\u003eblue flame\u003c\/strong\u003e and preventing incomplete combustion or \u003cstrong\u003esooting\u003c\/strong\u003e. This \u003cstrong\u003eOEM main burner orifice\u003c\/strong\u003e serves as the direct replacement for the legacy part 661055, ensuring that gas velocity and air entrainment meet the strict factory specifications for Nordyne, Miller, and Intertherm furnaces.\u003c\/p\u003e\n\n\u003cp\u003eConstructed from durable brass, the \u003cstrong\u003eNordyne 661055R\u003c\/strong\u003e is frequently utilized in natural gas applications or specialized high-altitude conversion kits where a #55 drill size is specified for derating. It is compatible with a broad range of \u003cstrong\u003eNordyne heating equipment\u003c\/strong\u003e, including M2 and M7 series models. Installing this \u003cstrong\u003egenuine Nordyne replacement part\u003c\/strong\u003e ensures the burner assembly operates at its design-rated BTU output, preserving system longevity and operational safety for residential and manufactured housing installations.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Gas Metering:\u003c\/strong\u003e The #55 drill size ensures accurate fuel delivery for stable combustion and optimal thermal transfer.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect OEM Fitment:\u003c\/strong\u003e Eliminates the risks of using non-standard spuds, ensuring the \u003cstrong\u003eNordyne 661055R\u003c\/strong\u003e seats perfectly into the burner manifold.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Tailored for use in furnaces under brands like Miller, Intertherm, and Frigidaire, making it a versatile tool-bag essential.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable Heat Output:\u003c\/strong\u003e Maintains factory-specified BTU ratings to prevent under-firing or hazardous over-firing conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this orifice used for natural gas or propane?\u003c\/strong\u003e\u003cbr\u003e\nThe #55 drill size is typically utilized for natural gas at standard elevations or for propane in specific high-altitude conversion scenarios. Always consult the equipment rating plate and local altitude charts for exact manifold pressure requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this for high-altitude derating?\u003c\/strong\u003e\u003cbr\u003e\nYes, in many Nordyne and Miller units, the #55 orifice is the specified component for installations between 2,000 and 7,000 feet to account for thinner air and maintain safe combustion ratios.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat symptom indicates a blocked or incorrect orifice?\u003c\/strong\u003e\u003cbr\u003e\nWeak, yellow-tipped flames or consistent ignition failures often point to a clogged or improperly sized orifice. Replacing a fouled part with a \u003cstrong\u003e661055R\u003c\/strong\u003e restores the high-velocity gas stream needed for proper primary air mixing.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Nordyne","offers":[{"title":"Default Title","offer_id":17334662987891,"sku":"661055R","price":10.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_ebcbfca0-18bb-48d9-9e99-f378c1947e38.png?v=1772080336","url":"https:\/\/www.gsistore.com\/products\/nordyne-661055r-orifice","provider":"GSIstore","version":"1.0","type":"link"}