Lochinvar & A.O. Smith 100111050 Blower

The Lochinvar & A.O. Smith 100111050 Blower Assembly is a critical OEM replacement part engineered specifically for BTH 199 and BTH 250 high-efficiency commercial water heaters. As a veteran technician, you know that maintaining the correct air-fuel mixture is non-negotiable for system longevity and peak thermal efficiency. This centrifugal blower features an integrated Variable Frequency Drive (VFD) that responds to Pulse Width Modulation (PWM) signals from the central control board. This allows for precise modulation of combustion air, ensuring stable ignition and consistent performance throughout the heating cycle. Using a genuine 100111050 blower prevents the common harmonics and vibration issues seen with universal alternatives. The assembly is designed for a direct bolt-on installation, though verifying the blower flange gasket and sensing tube connections is a standard best practice during the swap. This 5.89lb unit is the factory-spec solution to restore the forced draft burner operations in Lochinvar Cyclone and A.O. Smith Master-Fit series equipment.

• Direct OEM Match: Guarantees physical fitment and electrical compatibility with BTH 199/250 control logic.
• Integrated VFD: Provides precise blower speed control via digital PWM instructions for optimized combustion.
• Commercial Grade Durability: Designed to withstand the high-cycle demands of 199k and 250k BTU systems.
• Efficiency Restoration: Maintains the air-intake pressure required for clean, low-emission burning.

• Will this fit other BTH models? This specific assembly is calibrated for the 199 and 250 MBH inputs; always verify the part number on the existing blower housing.
• Does it include the mounting gasket? Most 100111050 blower assemblies are sold as the motor/housing unit; it is recommended to source a new silicone burner gasket (Part 100111593) for a proper seal.
• What causes these blowers to fail? Excessive debris in the combustion air intake or voltage fluctuations can stress the VFD module over time.

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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.