Greenheck’s latest addition to its line of Vari-Green energy control products is the VGD-100+ internal variable frequency drive. The VGD-100+ is equipped with Bluetooth communications and a smartphone companion app that makes set-up, status monitoring, and troubleshooting easy and intuitive. The app replaces the need to access controls directly on the drive while providing an easier to understand display. Users can monitor the status of multiple fans, adjusting speed and settings as required when used according to app specifications. The VGD-100+ also adds four digital inputs, two digital outputs, BACnet, and Modbus communications to meet the needs of today’s demanding applications.