Lochinvar & A.O. Smith 100111113 Burner Assembly

The Lochinvar & A.O. Smith 100111113 Burner Assembly is a factory-authorized OEM burner replacement engineered for high-recovery natural gas water heaters. Technical specifications confirm this unit features a precision-drilled #27 orifice, critical for maintaining the specific BTU input and stoichiometric air-fuel ratio required by NAT FV burner configurations. As a final burner assembly kit, it is designed to restore proper combustion characteristics and pilot stability in Flammable Vapor Ignition Resistant (FVIR) systems. For contractors servicing Lochinvar and A.O. Smith water heaters, this natural gas burner assembly ensures the manifold pressure and flame pattern remain within manufacturer parameters, preventing common issues like soot accumulation or premature thermopile failure. This 100111113 assembly is the direct successor to legacy part numbers, including cross-referenced A.O. Smith 9005959005 components, providing a seamless fit for commercial and residential atmospheric vent units.

Technical Performance Benefits

• Optimized Combustion: The factory-set #27 orifice provides precise fuel metering to ensure clean ignition and consistent thermal transfer.
• OEM Compatibility: Precision-engineered to fit A.O. Smith and Lochinvar FVIR water heater models without the need for field modifications.
• System Efficiency: Designed to maintain the natural gas heating system at its peak efficiency, reducing standby losses and operational cycles.
• Durable Construction: Built with high-grade materials to withstand the high-temperature environment of a sealed combustion chamber.

Common Contractor Questions

Does this burner assembly include the #27 orifice?
Yes, the 100111113 burner assembly comes pre-equipped with the #27 orifice, factory-calibrated for specific Lochinvar and A.O. Smith natural gas models.

What models are compatible with the 100111113 burner?
This assembly is primarily used in Lochinvar and A.O. Smith natural gas units that utilize a Final Burner Assembly configuration. Always verify the part number against your specific model's data plate.

Is this unit suitable for Propane (LP) conversions?
No, this is a natural gas burner assembly. Using this assembly with liquid propane can result in hazardous carbon monoxide levels and improper combustion.

California Proposition 65 Warning: This product may contain materials known to the State of California to cause cancer or reproductive harm.

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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.