The Danfoss VLT HVAC Basic Drive FC101 is supplied with built-in functions that reduce initial costs and increase productivity. It is the most compact unit in its class. Integrated DC coils reduce harmonics to an absolute minimum, and the Automatic Energy Optimizer saves 15-25% energy from the second you turn the it on. Achieve the lowest cost of ownership with a premier drive dedicated to ventilation, heating, and refrigeration applications. The Danfoss VLT HVAC Basic Drive FC 101 is designed for simple fan and pump applications where the drive is used nearby the motor. The VLT HVAC Basic Drive is designed to fit compact and basic functional performance HVAC applications, offering simple control features and most common HVAC protocols for a limited integration into your building management system.