Lochinvar & A.O. Smith 100109202 Burner

The Lochinvar & A. O. Smith 100109202 Burner Assembly is a factory-spec OEM replacement designed for high-efficiency performance in Natural Gas FVIR water heaters. As a veteran-grade NAT FV burner assy #33 ORF, this component features a precision-machined #33 orifice to ensure the exact BTU output and stoichiometric air-gas mixture required for Flammable Vapor Ignition Resistant (FVIR) systems. Constructed from heavy-duty aluminized steel, this 100109202 burner kit is engineered to withstand high thermal cycling without warping, maintaining a stable flame pattern that prevents resonance and incomplete combustion. Contractors often specify this genuine OEM burner for A. O. Smith and Lochinvar residential units to restore factory-standard gas water heater performance. Because this is a precise atmospheric burner assembly, it ensures optimal heat transfer and lower NOx emissions. Relying on authentic 100109202 replacement parts ensures full compatibility with existing manifold configurations and pilot assemblies, reducing labor time during field installation and preventing common ignition failures associated with universal alternatives.

• OEM Precision: Genuine Lochinvar and A. O. Smith 100109202 part ensures exact fitment for FVIR-compliant natural gas systems.
• Optimized Combustion: Features a calibrated #33 orifice size for consistent thermal input and flame stability.
• Durable Construction: High-grade metal housing resists corrosion and long-term heat stress in high-demand residential environments.
• Reduced Maintenance: Engineered for clean combustion to minimize carbon buildup on the burner tray and pilot assembly.

Is the 100109202 burner compatible with propane (LP)?
No, this assembly is specifically factory-bored for natural gas (NAT) only. Converting an FVIR burner assembly is not recommended; always use the gas-specific OEM part number.

When should a technician replace the burner assembly rather than cleaning it?
Replacement is necessary if the burner ports are clogged with heavy scale, or if there is visible warping or "flashback" occurring, which indicates the internal venturi is compromised.

Does this kit include the orifice?
Yes, this is a complete NAT FV burner assy integrated with the #33 orifice, ready for installation onto the manifold tube.

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.