Description
US Motors 6643 Varia Variable Speed Motor Overview
The US Motors 6643 is a 3/4 HP Varia variable speed motor engineered for demanding HVAC applications. Designed with dual-voltage capability at 115/208-230V, this motor offers installation flexibility across a wide range of residential and light commercial systems. As part of the trusted US Motors Varia product line, the 6643 delivers consistent, reliable performance in air handling, blower, and fan motor replacement applications.
Key Features
- 3/4 HP output for dependable HVAC system performance
- Dual voltage rating: 115/208-230V for flexible installation
- Varia variable speed technology for enhanced efficiency and comfort control
- Designed as a direct replacement motor for HVAC air handler and blower applications
- Built to US Motors’ high standards for durability and long service life
- Suitable for residential and light commercial HVAC systems
Why Choose US Motors?
US Motors is a leading name in HVAC motor manufacturing, known for producing reliable, high-efficiency motors trusted by HVAC professionals nationwide. The Varia series is specifically engineered to meet the variable speed demands of modern air handling systems, helping to reduce energy consumption and improve indoor comfort levels.
Application
- Air handlers and fan coil units
- Blower motor replacements
- Residential and light commercial HVAC systems







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