CyberAir 3 DX

Advances in energy efficient closed-circuit air conditioning

The CyberAir 3 precision air-conditioning system with Indirect Free Cooling and Direct Free Cooling conditions the air in Data Centers and equipment rooms up to 90 % more economically than conventional compressor cooling systems. 

CyberAir 3 DX air conditioning units in the standard door size are available as optimized energy or optimized output versions. The six sizes range from 950 to 3,110 mm in width.

Solutions for the CyberAir 3 DX

  • Room cooling

  • Small and medium-sized Data Centers

  • Equipment rooms

  • High-density Data Centers

  • Direct Free Cooling

  • Indirect Free Cooling

  • For use in the IT sector and medicine/hospitals



  • Maximum efficiency in air conduction

  • Maximum efficiency in cooling capacity

  • High cooling capacity per footprint

  • Designed for continuous, no-downtime operation over many years

  • Cools precisely, quietly and exceptionally economically

  • Design in Germany & Made in China

  • Benjamin Petschke, Product Manager

    "Thousands of customers around the world rely on units from the CyberAir series, being continuously developed for guaranteeing maximum benefits to customers."

Indirect Dynamic Free Cooling

STULZ Indirect Dynamic Free Cooling achieves up to 60 % more savings.

Indirect Dynamic Free Cooling

Direct Free Cooling

The CyberAir 3 DX precision air conditioning system with Direct Free Cooling air conditions Data Centers up to 90 % more economically than conventional compressor cooling systems.

Direct Free Cooling

EC fan optimized for CyberAir 3 DX

  • Reduced power consumption and noise
  • Nominal airflow rate at a fan speed optimized for partial load
  • Increased airflow in each size
  • Uses the advanced motors, electronic processor and impellers
  • The performance data already satisfies the requirements and standards of the future

EC compressor

  • Infinite compressor control for maximum efficiency and precise temperature regulation
  • Maximum efficiency especially in partial load and Mixed mode
  • Constant supply air temperature
  • Integrated soft start
  • Fast, precise reaction to actual variations in heat load
  • Long service life thanks to continuous operation without compressor on/off cycles
  • Upflow

  • Downflow

Variety of options for the CyberAir 3 DX



  • Cooling capacity range from 20 kW to 103 kW

  • EC fans: Quiet running, long life, maintenance-free

  • EC compressors provide infinite regulation of output

  • Available with 3 different refrigerants

  • Direct and Indirect Free Cooling

  • Microprocessor control of all functions and components, even when several units are combined in one system

  • Filter control manager

  • All parts requiring maintenance can be accessed from the front

  • Compact dimensions

  • Optimized filter areas and heat exchangers

  • Optimized air and water-side pressure drops

  • Filter class G4

  • Five refrigeration systems for upflow- and downflow, operation, five sizes, standard and low-energy versions

  • Standard door size for easy transport to final location

  • Very easy to service (access from the front)

  • Flexible installation in the Data Center


Control and monitoring

  • C7000 controller for controlling and monitoring the air conditioning system
  • High level of redundancy and availability thanks to autonomous controllers in every air conditioning module
  • Sequencing with standby functions
  • Control of up to 32 air conditioning modules per data bus system
  • UPS operation with configurable components for low unit power consumption
  • Recording of room climate
  • Service interface
  • Modbus protocol preinstalled
STULZ Services

For this product we recommend the following STULZ services

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