The Wilo-Yonos MAXO is a high efficiency pump for heating, cooling and air-conditioning applications combining high functionality and impressive efficiency through automatic performance control. The innovative product concept is based on deliberately arranged control levels and a distinct product structure. Setting the favored pressure head takes place by using just a single intuitive button supported by a multifunctional LED display indicating operation state, favored pressure head and faults. The new power plug with patent pending assures an easy electric connection even under difficult installation conditions.