Aaon R03990 Inlet Wheel Plenum Fan Replacement Part

The Aaon R03990 is a genuine OEM inlet wheel designed for use in AAON plenum fan assemblies found in commercial HVAC rooftop units and air handling systems. This replacement inlet wheel is a critical airflow component, responsible for drawing air into the plenum fan and maintaining efficient, high-static-pressure airflow through the unit.

AAON plenum fans feature a backward-curved impeller design that operates without a traditional scroll housing, discharging air freely into the plenum chamber. This open design allows the fan to rely on the plenum space itself for air distribution, delivering quiet and energy-efficient performance. The inlet wheel is integral to this assembly, directly influencing airflow volume and fan efficiency.

Key Features:

• Genuine OEM AAON replacement part — ensures proper fit and performance
• Designed for use in AAON direct drive backward-curved plenum fan assemblies
• Compatible with AAON RN Series, RQ Series, and related commercial rooftop and air handling units
• Supports high static pressure airflow delivery in commercial HVAC applications
• Direct drive design eliminates belt losses and reduces ongoing maintenance requirements

Replacing a worn or damaged inlet wheel with a genuine AAON OEM part ensures continued system efficiency and helps maintain the performance standards designed into your AAON HVAC equipment. Always verify compatibility with your specific unit model and serial number before ordering.