CyberCool 1

The source of liquid-based closed-circuit cooling

With a cooling capacity of up to 235 kilowatts per unit, STULZ CyberCool 1 permanently supplies precision air-conditioning units in Data Centers with chilled water, thereby providing the basis for reliable closed-circuit cooling.

Solutions for CyberCool 1 units

  • Chiller for medium-sized Data Centers

  • Indirect Free Cooling

  • For outdoor installation

  • IT

The CyberCool 1 Chiller is available as a compact standard version (CSO) and a low-energy, low-noise CLO version.

Technical Data

Cooling capacity total (kW)

36 - 235




R410A (GWP: 2,088)

R407C (GWP: 1,774)




  • Cuts lifecycle costs by up to 40 % by strategic switching between Free Cooling, Mix and Compressor Cooling modes and the systematic use of steplessly controlled drives

  • Quiet, high-efficiency scroll compressor

  • Easy, fast installation and start-up

  • Speed-controlled condenser fans for slow ongoing operation at low outside temperatures

  • Noise-insulated compressor chamber (CLO)

  • Noise-optimized condenser fan configuration with lower speed range (CLO)

  • Halves perceived noise by reducing noise by up to 10 dBA (CLO)

  • ERP compliance

    This product meets the efficiency values according to ErP 2018

  • Tobias Wolf, Product Manager

    "A compact, sophisticated, investment-optimized air-cooled chilled water generator for applications in small to medium-sized Data Centers."




  • Compact chillers for outdoor installation, ready for connection

  • 3 sizes with 11 models in an output range of 36–235 kW

  • Outside temperature range -10 °C to +40 °C as standard


Control and monitoring           

  • C7000 controller
  • STULZ hardware and software developed in-house
  • Connection to building automation systems
  • Energy efficient system operation at every operating point
  • Early warning system (warning and main alarm)
  • Service interface

Efficiency challenging the future: ErP 2018 ready

The European Regulation EU 2016/2281, known as ErP 2018, sets the new SEPR parameters for assessing the energy efficiency of chillers. The CyberCool 1 complies with the limits required by ErP 2018. 


  • E.E.R.: Energy Efficiency Ratio
    Chiller efficiency at a certain condition.


  • E.S.E.E.R.: European Seasonal Energy Efficiency Ratio
    Seasonal efficiency of a chiller for comfort: ambient air from 25 to 35°C


  • S.E.P.R.: Seasonal Energy Performance Ratio
    Evaluates the load and temperature variations during the year,
    relative to the chiller's electricity consumption.

Parameters for high-temperature process cooling chillers (EU 2016/2281):



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22457 Hamburg 

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Fax: +49 40-5585-352

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