Power, Heating & Cooling (APU4)

The Calatherm APU 4 is an EU Stage V compliant diesel auxiliary power unit that generates three-phase electrical power for onboard equipment and supports year-round climate control with both heating and cooling when paired with a remote mounted HVAC system. Driven by a water-cooled turbo diesel engine and supported by an integrated engine cooling pack, it keeps vehicle systems running and cabins comfortable without the main engine. Its modular, serviceable design makes installation and maintenance simple, while cutting engine idling, fuel consumption and engine wear on specialist vehicles.