Lochinvar & A.O. Smith 100111395 Blower Assembly

The Lochinvar & A.O. Smith 100111395 Blower Assembly is a critical OEM replacement component engineered for precision combustion air delivery. Operating at 120V with a fixed speed of 3300 RPM, this motor-and-housing assembly is designed to maintain the specific static pressure requirements of high-efficiency condensing boilers and water heaters. As a factory-authorized Lochinvar replacement part, it ensures the correct fuel-to-air ratio is maintained throughout the firing cycle, preventing ignition failures or erratic flame signals common with generic alternatives. This centrifugal blower is built to withstand the thermal stresses of continuous operation in residential and commercial hydronic systems. This unit, often identified under A.O. Smith 100111395 or cross-referenced with Lochinvar blower motor specifications, features a plug-and-play wiring harness for rapid field installation, reducing downtime on the job site while restoring the system to original manufacturer performance standards.

Technical Benefits for Contractors:

• Direct OEM Compatibility: Verified as a genuine 100111395 blower assembly for Lochinvar Knight and A.O. Smith Cyclone models, ensuring mounting holes and port alignments match exactly.
• High-Speed Stability: The 3300 RPM motor is balanced to minimize vibration, extending the service life of the inducer housing and surrounding sensitive electronics.
• Optimized Combustion: Engineered to provide the consistent airflow necessary for proper venting and efficient heat exchange.
• Industrial-Grade Construction: Designed to handle the high-static environments typical of modern sealed-combustion appliances.

Common Questions:

Is the 100111395 blower interchangeable with universal motors?
No. To maintain the UL/CSA listing and ensure safe combustion, you must use this specific OEM blower assembly. Universal motors rarely match the specific RPM and torque curves required for the burner’s pressure switch to close reliably.

Does this assembly include the gasket?
Standard field practice recommends sourcing the mounting gasket separately if it is not integrated, ensuring a gas-tight seal at the blower outlet to prevent CO leakage into the mechanical room.

What are the symptoms of a failing blower assembly?
Technicians should look for "failed to prove" air pressure switch errors, excessive bearing noise, or high-limit trips caused by insufficient airflow through the heat exchanger.

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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.