This specific model is calibrated for 3"-6" WC

Engineered for 300 lb stem force applications

it ensures a leak-free seal and maintains proper head pressure

The adjustable design features a radius ranging from 7/8 inch to 3 1/8 inches

making it ideal for high-temperature hydronic systems

Lochinvar & A.O. Smith 100144992 Fan Assembly 323269-701 This specific model is calibratedThe Lochinvar & A. O. Smith 100144992 Fan Assembly is a critical OEM replacement part designed for high efficiency commercial boilers and water heaters. This 115V blower motor assembly manages precise combustion air delivery, featuring a 1 2 HP motor balanced for high static pressure applications. Operating at a fixed 1650 RPM, it ensures stable manifold pressure and optimal heat exchanger performance. This unit is the direct manufacturer mandated