Hydrovar is the Worlds first pump mounted micro-processor system controller. It is a drive unit with a full range of electrical controls and protection built in to the design. Hydrovar will change motor speed, manage constant pressure or constant flow and vary pressure and flow to compensate for any system losses. This intelligent and user friendly VSD is designed for centrifugal pumps from 1.1kW upwards for a wide range of applications including building services, heating or cooling circulation and water supply booster systems.