CyberHandler 2

The Indirect Evaporative Free Cooling Air Handling Unit

Far more than just a product, the CyberHandler 2 is a complete solution offering you not only a wide range of cooling capacities from 30 to 520 kW, but also a full range of services such as Life Cycle Cost Calculation, Reverse Osmosis water treatment, Commissioning and Maintenance. With a high efficient indirect evaporative Free Cooling design and state-of-the-art components the CyberHandler 2 minimizes the running costs and achieves pPUE values down to 1,02 depending on application and location.

Animation CyberHandler 2

The complete solution

CyberHandler 2 is more than a product. We have a full range of services and features available to offer you a turnkey solution for the data center cooling:

Technology and Infrastructure

  • Indirect Free Cooling: No contamination from outside air
  • Unbeatable efficiency levels with pPUE values between 1.02 - 1.10 depending on application and location
  • Year-round operation with evaporative cooling
  • Outdoor installation — Saves space in the data center
  • Reverse osmosis (Hygienic Safety, Durable)
  • Removes unwanted substances: 99 % of water impurities, 100 % of Legionella

CyberHandler 2 Select

  • Calculation of return on investment
  • Simulation of individual product requirements in the CyberHandler 2 Select and optimization of operating conditions


  • Simplified installation
    • Problem-free routing of power cables, water pipes and other piping
  • Optimized maintenance conditions
    • Service engineers do not have to enter server rooms
    • Fast, low-cost maintenance
  • Low total cost of ownership (TCO)
    • Reduced capital expenditure (CAPEX), operating expenditure (OPEX), and repair and infrastructure costs
    • Reduced electrical infrastructure enables CAPEX savings of 6-8 %

Solutions for CyberHandler 2 units

  • For small to large Data Centers

  • Indirect Free Cooling

  • Indirect Evaporative Free Cooling

  • For use in the IT sector

Operating modes

Operating Modes

The special construction with its extremely efficient combination of Free Cooling and evaporative cooling reduces energy costs. The system has been optimized to such an extent that in most regions, 100% mechanical cooling is no longer necessary. pPUE values as low as 1.02 can be achieved.

Dry Mode: At low outside temperatures, hot air from the data center is cooled down by the cold outside air via the plate heat exchanger.

Wet Mode: When the outside temperature is moderate, the outside air is precooled by the adiabatic system before passing through the heat exchanger, where it cools down the air from data center.

Top-Up Mode: At very high outside temperatures, a compressor refrigeration system is used in addition to the adiabatic system to provide top-up cooling.

"Dry Mode" (Free Cooling only):
Adiabatics OFF
Mechanical Cooling OFF

"Wet Mode" (Adiabatic):
Adiabatics ON
Mechanical Cooling OFF

"Top-Up Mode" (Mix Mode):
Adiabatics ON
Mechanical Cooling ON

Components of CyberHandler 2



  • 11 standardized sizes

  • Ready for roof and wall installation

  • The best casing leak classification according to the standard EN1886 (L1/L1)

  • Designed for minimum pressure losses

  • STULZ C7000 controller designed especially for precision control of mission-critical environments

  • Easy access for maintenance

  • Several filter classes available: G4, M5, F7 and F9

  • Designed to fit standard transportation

  • Flexible modular installation

  • 3 cooling systems in 1: Indirect Free Cooling, Indirect evaporative cooling, Mechanical cooling (as top-up or redundancy)

Cooling and installation configurations



Testing facilities

In our Test Center, located near Madrid in Spain, we can perform a variety of tests on the Air Handling Units in a state-of-the-art test chamber. This enables our clients to witness the units operating under simulated extreme conditions, providing critical information such as performance data, energy consumption and water consumption.

Test parameters

  • Function tests for simulating the safety features
  • Physical dimensions of the units
  • IT load up to 520 kW
  • Airflows up to 120,000 m3/h
  • Outdoor ambient conditions:
    • Temperature range from +10 to +50
    • Humidity range from 30% RH to 90% RH



Variety of options for the CyberHandler 2


Control and monitoring

  • Designed specifically for precision control of mission-critical environments
  • Energy-efficient control concepts onboard (CW standby management, raised-floor pressure management, Indirect Dynamic Free Cooling)
  • Preservation of parameters during firmware updates
  • Onboard protocol Modbus RTU (customizing Modbus data point list)
  • Freely configurable digital alarm inputs
  • Integrated data logger
  • Internal Modbus component communication bus
  • Hardware periphery check after boot sequence
  • The following BMS protocols are supported: BACnet IP, BACnet MS/TP, Modbus TCP, and LonWorks

WIB 8000

The WIB 8000 all-in-one-web interface is user-friendly and highly functional, and it offers easy data exchange and monitoring with global adaptability.

Functions and Monitoring

  • Alert information via e-mail to up to five recipients
  • Ongoing retrieval of data from the controller
  • Monitoring of up to 32 units via Web browser
  • Ethernet port
  • Bus-independent zone operation
  • Easy connection to existing building management system
  • Works via HTTP and SNMP in parallel
  • No JavaScript, no cookies
  • Easy and quick configuration via Web page
  • Easy to install and suitable for retrofitting



  • STULZ CyberHandler2 Brochure 1803 EN

    CyberHandler 2
    The Indirect Evaporative Free Cooling Air Handling Unit

    • File: STULZ_CyberHandler2_brochure_1803_EN.pdf

    • Type: Adobe PDF

    • Size: 2,99 MB

    • Language: English

    • Date: 2018-05-22

STULZ Services

For this product we recommend the following STULZ services

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