Lochinvar & A.O. Smith 100109924 Blower Assembly

The Lochinvar & A.O. Smith 100109924 Blower Assembly is a critical 120V combustion component engineered for high-efficiency commercial water heaters and condensing boilers. Designed specifically for the Cyclone BTH and SUF series (120, 150, and 199 models), this OEM combustion blower manages the precise air-to-fuel ratio required for optimal burner performance. As a veteran-grade centrifugal fan assembly, it ensures the complete discharge of flue gases while drawing in fresh air for the combustion cycle, directly impacting the unit’s AFUE rating and thermal stability. This replacement blower motor features a heavy-duty housing and precision-balanced impeller to minimize vibration and bearing wear in high-demand environments. Rigorous HVAC ventilation standards require professional-grade components like the 100109924 to maintain consistent manifold pressure and prevent nuisance flame-out codes. Whether you are performing a scheduled teardown or an emergency swap on a Lochinvar or A.O. Smith boiler, this authentic assembly provides the factory-spec torque and RPMs needed for reliable ignition and heat transfer.

Key Benefits

• Optimized Combustion: Precision-calibrated for 120V combustion blower applications, ensuring exact airflow for Cyclone BTH 150/199 systems.
• Direct OEM Fitment: Eliminates the mounting and wiring headaches of universal HVAC replacement parts, fitting existing brackets and combustion chambers perfectly.
• High-Efficiency Performance: Enhances fuel efficiency and reduces emissions by maintaining stable pressure across the heat exchanger.
• Industrial-Grade Build: Constructed with high-temp resistant components to withstand the rigorous duty cycles of commercial gas water heaters.

Common Questions

Which specific units are compatible with the 100109924?
This assembly is primarily utilized in A.O. Smith Cyclone BTH and Lochinvar SUF series commercial water heaters with inputs of 120, 150, and 199 MBtu. Always verify your serial number to confirm the correct motor winding and housing alignment.

Does this blower include the mounting gasket?
While this is the OEM blower assembly, we highly recommend inspecting the existing gasket and replacing it during installation to ensure a gas-tight seal at the vent connection.

What are the symptoms of a failing blower assembly?
Common indicators include loud bearing noise, "Air Proving Switch" error codes, or failure to initiate the pre-purge cycle during ignition attempts.

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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.