Lochinvar & A.O. Smith 100109280 Burner Assembly

The Lochinvar & A.O. Smith 100109280 Burner Assembly is a high-precision OEM replacement engineered for Natural Gas (NAT) water heaters and boilers requiring a #33 orifice size. This FV (Flammable Vapor) burner assembly is critical for maintaining the stoichiometric balance required for efficient combustion and stable flame patterns in high-recovery heating systems. Designed to meet strict safety standards, this assembly promotes optimal heat transfer while minimizing carbon monoxide production, a vital factor for HVAC service companies performing routine maintenance or emergency repairs on Lochinvar boilers and A.O. Smith commercial units.

As a direct-fit component, the 100109280 burner simplifies the replacement process for contractors, ensuring compatibility with the existing manifold and ignition system. The integration of Natural Gas FV technology helps prevent the ignition of flammable vapors outside the combustion chamber, providing a necessary safety barrier in residential and light commercial settings. Utilizing authentic A.O. Smith burner assembly components ensures that the equipment maintains its original efficiency ratings and operational reliability under heavy thermal loads.

• Precision-engineered #33 orifice for calibrated natural gas delivery and efficient fuel-to-air ratios.
• Designed for Flammable Vapor (FV) compliance, enhancing safety during gas furnace repair and water heater servicing.
• Direct OEM replacement part for Lochinvar and A.O. Smith systems, ensuring seamless physical and technical compatibility.
• Rugged construction built to withstand constant thermal cycling in high-demand HVAC system environments.
• Supports consistent flame rectification and ignition reliability for energy-efficient HVAC installation.

Is the #33 orifice compatible with Propane (LP) systems?
No, this assembly is specifically factory-set for Natural Gas (NAT). Converting the orifice size without manufacturer authorization can lead to improper combustion and hazardous operating conditions.

When should an HVAC technician replace the entire burner assembly?
Replacement is recommended if the burner assembly shows signs of severe scaling, warped ports, or if the FV technology components have been compromised by moisture or physical damage, which cannot be resolved through cleaning alone.

Does this assembly include the pilot and ignitor?
This part number typically covers the manifold and burner head with the #33 orifice; however, technicians should verify if additional ignition components are required based on the specific Lochinvar or A.O. Smith model number before beginning the hvac repair.

This item is not eligible for free shipping.

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.