PhaZair-230, SINGLE PHASE 5.5kW *, Variable Speed, Floor Mounted No Dryer Our new model represents the highest evolution of the PhaZair-230 range, thanks to the electronic control unit ‘K TRONIC 5’ running all of the compressor functions/indicators: loading/idling cycle, working hours, oil temperature, working pressure, alerts. This is a technological solution to an age old problem, providing a much higher capacity to users limited by a single phase 230V power supply! *40amp Power Supply Required.