The ABB ACH550 intelligent HVAC drive is dedicated to saving energy, producing quality air, and alleviating environmental concerns. Reduce costs by controlling your building°Øs fans, compressors, and pump motors efficiently, for an energy conscious commercial environment. The ABB ACH550 provides proven reliability, flexibility, and every essential HVAC communication protocol. It is pre-programmed for several applications, including: air handling units, cooling towers, chillers, and more