Nordyne 661045R Orifice

The Nordyne 661045R is a precision-machined #45 Main Burner Orifice engineered specifically for technical compatibility with Nordyne HVAC equipment. As a critical component in the combustion manifold, this LP gas orifice (liquid propane) regulates fuel flow to ensure a stable gas burner flame and optimal thermal output. Designed for use in residential heating systems, including G6RA, G6RK, G6TA, G6TK, and MG1E series furnaces, this #45 drill size orifice provides the exact metering required for high-efficiency operation in upflow, downflow, and horizontal configurations.

For contractors performing furnace LP conversion or manifold maintenance, the 661045R burner part offers a direct OEM replacement that maintains the factory-specified pressure drop and BTU input. The durable brass construction is built to withstand the rigorous heat cycles of a gas furnace burner assembly without port deformation. Ensure your manifold pressure is calibrated to manufacturer specifications when installing this Nordyne replacement part to prevent soot accumulation or inefficient combustion.

• Engineered Precision: Specifically sized as a #45 orifice for accurate liquid propane gas metering in compatible Nordyne and Miller units.
• Broad Compatibility: Fits a wide range of residential furnace models including MG1E and G6 series HVAC systems.
• OEM Standards: This genuine Nordyne part ensures seamless integration with the existing burner manifold and gas valve assembly.
• Combustion Efficiency: Optimized for maintaining a consistent gas burner flame, reducing energy waste and preventing ignition delays.

Is the Nordyne 661045R compatible with Natural Gas?
No, this specific #45 orifice is typically utilized for LP (Liquid Propane) gas applications. Verify your LP conversion kit requirements before installation, as natural gas usually requires larger orifice sizing.

Which furnace models use the 661045R orifice?
It is a standard main burner orifice for Nordyne, Intertherm, and Miller furnaces, particularly within the 040-08, L1RC, and G6 series platforms.

Why is it important to use an OEM #45 burner orifice?
Using an official OEM part ensures the BTU rating and gas-to-air ratio remain within safety tolerances, avoiding potential heat exchanger damage caused by over-firing.

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.