Lochinvar & A.O. Smith 100135300 Main Burner

As a veteran technician, you know that maintaining high-efficiency combustion requires precision components. The Lochinvar & A.O. Smith 100135300 Main Burner is the direct OEM replacement burner for failing or carbon-fouled units in commercial water heaters and boilers. This specific gas burner assembly is 100% identical to the BNR3417 and is engineered for Lochinvar Copper-Fin and EnergyRite models, specifically those within the 400,000 to 750,000 BTU input range. Constructed from high-grade stainless steel to resist thermal stress and corrosion, this main burner tube ensures a steady, blue flame pattern for optimal heat transfer. It also serves as a reliable replacement for legacy part numbers 100135233 and BNR2405. When performing HVAC burner maintenance, replacing a warped or clogged burner with this genuine Lochinvar part restores the manifold's pressure balance and prevents delayed ignition or soot buildup in the combustion chamber. Trust this water heater burner replacement to maintain site safety and peak equipment performance.

• Universal Compatibility: Fits a wide range of Lochinvar Copper-Fin (EB/EW 150-300) and A.O. Smith commercial units.
• Direct OEM Match: Replaces BNR3417, 100135233, and BNR2405 with zero field modifications required.
• Heavy-Duty Construction: Built to withstand the high-intensity thermal cycles of 400-750K BTU models.
• Combustion Precision: Designed to provide a uniform flame spread, reducing hot spots and improving efficiency.

Is the 100135300 a direct swap for the BNR3417?
Yes, the 100135300 is the current manufacturer part number and is identical in form, fit, and function to the Lochinvar BNR3417.

What are the symptoms of a failing commercial burner?
Common indicators include yellow flame tips, visible soot on the heat exchanger, delayed ignition "booms," or uneven heating across the burner manifold.

Does this burner work for both Natural Gas and LP units?
While the main burner tube itself is compatible, you must ensure the burner orifice is correctly sized for your specific fuel type and altitude requirements.

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.