The Thermo Top Pro 120/150 heaters feature an innovative burner concept and an intelligent diagnosis and security system. Sensors monitor the exhaust gases and coolant temperature and continuously transmit the values to the control unit. One of the new features in this performance class is the automatic altitude adjustment.

On one hand, the automatic altitude compensation ensures full heating capacity at altitudes of up to 3,500 meters above sea level. On the other, the heater also functions at extreme temperatures as
low as minus 40 degrees Celsius. The compact size and light weight enable easy installation of the water heater, even in confined spaces.

The new cooling pump U4850 provides a high volume flow and improved pressure resistance. Furthermore it does have an intelligent self-protection function and communicates to the control unit. The diagnosis process provides analysis of the heater as well as the cooling pump performances. The result: easy diagnosis and quick maintenance within the workshop.


  • Small, light and lean design
  • Conventional diesel fuel and 100% paraffinic diesel fuel (incl. renewable fuels, such as HVO)
  • ECU and all connections on one side
  • Easy to reach plugs for a fast installation
  • Low noise emission
  • Automatic altitude compensation up to 3,500 m NHN
  • More safety and diagnostic functions
  • New, powerful coolant pump U4850 
  • Suitable for use in vehicles for transporting hazardous materials (ADR)