U.S. Motors 8904 – 3/4 HP MOTORBOSS Direct Drive Fan and Blower Motor, 115V, 1075 RPM
The U.S. Motors model 8904 MOTORBOSS is a 3/4 horsepower direct drive fan and blower motor designed for residential and light commercial air moving applications. Built with a permanent split capacitor (PSC) design and automatic thermal overload protection, it delivers consistent performance in continuous-duty ventilation systems.
Technical Features:
Horsepower: 3/4 HP
Voltage: 115V
Amperage: 9.5 A
Speed: 1075 RPM
Mounting: Band/hub/stud
Frame Size: 48
Insulation Class: B
Rotation: Reversible
Service Factor: 1.0
Bearing Type: Self-aligning ball bearing
Thermal Protection: Automatic reset overload
Application Notes:
PSC motor construction supports efficient operation and reduced power draw
Designed for direct-drive blower and fan assemblies in HVAC units
Reversible rotation provides installation flexibility depending on airflow direction requirements
Compact 48 frame enables compatibility with common residential air handler and furnace models
Suitable for continuous duty applications in standard ambient operating conditions
Installation Guidelines:
This motor is intended for professional HVAC system replacement and retrofit applications. It should be installed in accordance with the appliance manufacturer’s specifications and applicable electrical codes. Contractors should verify shaft size, rotation, voltage compatibility, and mounting configuration prior to installation. Motor should be properly grounded and connected using manufacturer-approved capacitors.