Lochinvar & A.O. Smith 100135305 Burner

The Lochinvar & A.O. Smith 100135305 Burner is a critical combustion component engineered for high-efficiency performance in commercial and residential heating platforms. As a direct, identical replacement for the BNR3423, this main burner assembly is designed with a dedicated pressure tap to allow technicians to verify manifold pressure and ensure optimal gas-to-air ratios during commissioning or routine maintenance. Built to sustain uniform thermal distribution, this burner mitigates hot spots and ensures clean ignition cycles, making it a staple for maintaining the operational integrity of Lochinvar Knight boilers and EnergyRite pool heaters.

When performing a burner replacement, contractors should prioritize combustion analysis to match manufacturer specifications for CO2 and O2 levels. This part is frequently used in gas-fired water heaters requiring a replacement heating element burner that can withstand high-cycle commercial demands. Its robust metallurgy resists soot accumulation and thermal fatigue, extending the service life of the heat exchanger by preventing flame impingement. For professionals troubleshooting ignition failures or oscillating flames, swapping an aged BNR3423 with a factory-spec 100135305 restores thermal efficiency and system reliability without requiring field modifications to the burner tray.

• Precise Pressure Monitoring: Integrated pressure tap allows for real-time manifold pressure adjustments to meet specific BTU input requirements.
• OEM Compatibility: Serving as the Lochinvar BNR3423 replacement, it fits seamlessly into the original burner assembly without retrofitting.
• Optimized Combustion: Engineered for stable flame control, reducing carbon buildup and maximizing fuel economy in condensing and non-condensing units.
• Durable Construction: High-grade materials resist corrosion from combustion byproducts, ensuring consistent performance in high-humidity environments.

How do I know if my Lochinvar burner needs replacement?
Inspect for physical degradation such as cracked ceramic ports, heavy scaling, or evidence of flame rollout. If combustion analysis shows high CO levels that cannot be adjusted via the gas valve, the burner internal geometry may be compromised.

Is this part compatible with both Natural Gas and Propane units?
This burner is typically gas-type specific based on the orifice size. Always verify your current gas burner orifice and manifold pressure settings against the appliance rating plate before installation.

Does the 100135305 include the mounting gasket?
While the burner is the primary component, we recommend inspecting the burner mounting gasket and flame sensor during installation and replacing them if they show signs of thermal wear or brittleness.

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.