Rheem-Ruud 70-21858-09 Fan Blade

The Rheem-Ruud 70-21858-09 Fan Blade is a critical condenser fan replacement for specific outdoor HVAC units. Engineered as a 2-blade assembly, this component features a 20-inch diameter and a precise 21-degree pitch to optimize airflow across the coils, ensuring efficient heat dissipation. Built with a 1/2-inch bore designed for intake-side mounting, it facilitates a CCW (Counter-Clockwise) rotation (facing the air discharge) to maintain proper static pressure. For technicians in the field, this direct replacement fan blade addresses common performance issues like excessive vibration or decreased heat exchange caused by bent or unbalanced blades. Replacing a compromised 70-21858-09 blade helps lower compressor discharge temperatures and prevents premature wear on the condenser motor bearings. This OEM-spec part ensures the precise balance required for quiet operation and consistent performance in residential and light commercial Rheem, Ruud, and ProTech cooling systems.

• Optimized Performance: The 21-degree blade pitch is engineered for maximum cubic feet per minute (CFM) with minimal amperage draw.
• Precise Fitment: Features a factory-standard 1/2-inch bore for secure mounting on OEM motor shafts without the need for adapters.
• Vibration Reduction: Factory-balanced 2-blade design eliminates system resonance, protecting the motor and housing from mechanical stress.
• Corrosion Resistance: Constructed from durable materials to withstand outdoor environmental exposure and high-velocity debris.

What is the direction of rotation for the 70-21858-09?
This blade is designed for CCW (Counter-Clockwise) rotation when viewed from the air discharge side. Always verify motor rotation before installation to ensure the blade pulls air through the coil rather than pushing it.

Where is the hub located on this fan blade?
The hub is located on the intake (or inlet) side. This is standard for condenser fan blades where the motor is positioned below the fan in an upright condensing unit.

Can I use this as a universal 20-inch fan blade?
No. While the diameter is standard, the 21-degree pitch and specific hub offset are matched to the torque profile of Rheem-Ruud outdoor units. Using an incorrect pitch can overload the fan motor or cause insufficient cooling.

This item is not eligible for free shipping.

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.