Refrigeration system


The CoolTeg Plus DF rack-mount cooling unit combines the advantages of the CW and XC systems – Free-Cooling for low and medium outdoor temperatures and compressor cooling for high outdoor temperatures. Thus, this system achieves minimum operating costs without compromise.


  • Free-Cooling for most of the year – the unit has the most efficient exchanger in its category.
  • The intelligent control system takes advantage of Free‑Cooling to pre-cool the air even at high outside temperatures – thus, electricity consumption remains minimal.
  • Thanks to the savings in operating costs, what you have invested in this unit will be recovered in a few years (compared to DX or XC systems).
  • Thanks to the use of water as the main heat carrier, waste heat can continue to be used, for example for heating or other purposes, and thus further reduce costs.
  • The water circuit and the compressor circuit can be connected to two different water sources – this guarantees total redundancy of the unit.


  • 2 in 1 – small, efficient cooling unit that cleverly combines water and compression cooling.
  • Electronically controlled expansion valve – maximum cooling efficiency in all conditions
  • Inverter-driven compressor – minimum energy consumption for all cooling powers
  • Fans with EC technology allow for effective and fluid airflow control.
  • The intelligent control system guarantees precise achievement of the required air parameters and minimum consumption. It also immediately alerts you to any problems.
  • Operating range from -40 to +40 °C (the upper temperature limit depends on the size of the outdoor exchanger). Possibility of ordering accessories that allow the unit to operate even from -55 °C.
  • Ecological refrigerant R410A

Compared to unit
CoolTeg compression
Plus DF can save up to
20 MWh annually.

Find out where you can use these ventilation units

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