Rheem-Ruud 51-21964-11 Vent Motor With Blades

The Rheem-Ruud 51-21964-11 Vent Motor With Blades is the direct OEM replacement for the discontinued 21964K and 51-21964-01 induced draft assemblies. Engineered for precision performance in high-efficiency gas furnaces, this Fasco 7102-0628 motor operates at 208-230V, delivering a nominal 3000 RPM at 1/200 HP. As a critical draft inducer blower, it ensures proper combustion by drawing flue gases through the heat exchanger and exhausting them safely. This HVAC vent motor kit includes multiple fan blade diameters (3", 3 1/4", and 3 3/4") and a centrifugal proving switch to maintain pressure safety limits. Designed with a 1/4-inch round shaft and a 4 1/4-inch mounting bolt pattern, it provides a drop-in solution for Rheem, Ruud, and WeatherKing units requiring a CW rotation induction motor. Proper installation requires locking the set screw on the smooth shaft using the included thread locker to prevent vibration-induced decoupling.

• Direct OEM Compatibility: Specifically designed to replace the 21964K, ensuring exact fitment with zero field modifications required.
• Complete Installation Kit: Ships with three varying blade sizes and 24205 thread locker for versatile application across multiple furnace cabinet configurations.
• Optimized Performance: The 3000 RPM draft inducer motor maintain statutory static pressure levels for reliable ignition and combustion cycles.
• Durable Construction: Class B insulation and impedance protection safeguard the internal windings against the high-heat environment of the exhaust stream.

• Does this motor replace the 21964K assembly? Yes, the 51-21964-11 is the current manufacturer-specified replacement for the legacy 21964K and 51-21964-01 parts.
• Why does the kit include multiple fan blades? Rheem utilizes this motor across various BTU ratings; you must select the blade diameter that matches your original venter motor setup for correct CFM.
• Is a flat spot required on the motor shaft? No, this motor features a round shaft. It is critical to use the provided Loctite on the set screw to ensure the fan blade remains secure during operation.

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.