Blower Assembly, Powervent, Residential

Rheem SP21031B OEM Induced Draft Blower Assembly – Replacement for Residential Power Vent Gas Water Heaters

The Rheem SP21031B is a factory-authorized replacement induced draft blower designed for use in select Rheem, Ruud, and Richmond residential power vent water heaters. This critical component manages exhaust gas flow from the combustion chamber and enables proper ignition by activating the pressure switch within the system’s control circuit.

Engineered to OEM specifications, this blower assembly provides dependable performance in sealed combustion applications, maintaining safe venting and consistent operation. It’s designed for quick field replacement with integrated motor, housing, and electrical connections preassembled at the factory.

Core Features

• OEM-Certified Assembly: Manufactured to exact Rheem tolerances for system compatibility and performance consistency
• Fully Integrated Unit: Includes blower motor, fan housing, and harness connection in a sealed assembly—ready for direct install
• Application-Specific Fit: Designed specifically for Rheem residential power vent models—verify compatibility via serial number lookup or parts cross-reference
• Sealed Motor Design: Reduces exposure to condensate or combustion byproducts, protecting internal components and extending service life

Technical Specifications

• Part Number: SP21031B
• Voltage: 120V AC
• Mounting Configuration: Direct top-mounted installation with gasket and screws (check unit-specific layout)
• Function: Draft inducer for combustion air and exhaust handling
• Installation: Intended for use with ULN/FVIR power vented gas water heater models

Installation Considerations

This replacement should be performed with the water heater disconnected from power and gas sources. Installation typically includes removal of the old blower, cleaning the sealing surface, and securing the new unit with the existing mounting hardware. The pressure switch tubing and electrical harness must be reattached to ensure proper control circuit communication.

While designed for efficient installation, this assembly should be installed by a qualified HVAC or plumbing technician to ensure compliance with safety codes and proper system integration.

Professional Notes

• Service Efficiency: OEM part streamlines diagnostic resolution for airflow-related faults and ignition lockouts
• Reliability: Reduces callbacks by using manufacturer-approved components
• Supportability: Backed by Rheem’s technical documentation and support network

Key Benefits

• Factory-Assembled Unit – Prewired and pretested, minimizing on-site assembly errors
• Performance Assurance – Maintains system design specifications for draft pressure and ignition sequence
• Long-Term Durability – Motor housing and fan wheel engineered for high-temperature operation in vented environments

The Rheem SP21031B Blower Assembly is a mission-critical component in sealed-combustion power vent systems. For dependable operation, use only authorized OEM replacements. Confirm model compatibility before ordering to ensure proper function and field-fit integrity.