Nordyne 661042R Burner Orifice

The Nordyne 661042R Burner Orifice is a precision-engineered OEM replacement part designed for high-efficiency LP gas furnace conversion and maintenance. Featuring a strictly calibrated .042 orifice size (industry-standard #42 drill size), this component is critical for regulating the manifold pressure and gas velocity in low-pressure propane systems. As a veteran-grade HVAC replacement part, it ensures the correct stoichiometric air-to-fuel ratio, preventing incomplete combustion and soot buildup in the heat exchanger.

This LP burner orifice is compatible with the Nordyne G5RA and M1GB series, as well as various Miller and Intertherm mobile home furnaces. Technical specifications confirm a durable brass construction that resists thermal expansion and debris occlusion, improving combustion efficiency across both residential and light commercial applications. Properly sized orifices like the 661042R are essential for maintaining the rated BTU output of the burner assembly, ensuring stable flame rectification and consistent heat transfer performance during heavy heating cycles.

• Precision Metering: The .042 orifice size (#42) ensures exact LP gas flow regulation for optimal burner performance.
• Direct OEM Fit: Guaranteed compatibility with Nordyne, Miller, and Intertherm furnace burner tubes.
• Enhanced Combustion: Engineered to stabilize the fuel jet, leading to improved furnace energy efficiency and reduced emissions.
• Rugged Construction: High-grade brass build maintains dimensional stability under high-temperature furnace conditions.

Is this orifice suitable for Natural Gas to LP conversions? Yes, the 661042R is specifically designed for LP gas furnace conversion. Always verify your manifold pressure settings against the data plate after installation.

Will this fit my Miller or Intertherm furnace? Yes, as an OEM Nordyne part, this #42 burner orifice is the standard specification for many Miller and Intertherm mobile home heating units.

What happens if I use the wrong orifice size? Using an incorrect size can lead to over-firing or under-firing. The .042 burner orifice ensures your unit operates at the manufacturer’s specified thermal capacity.

Disclaimer: 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.