Free Cooling


High Efficiency with Free Cooling

When it comes to reducing energy consumption and costs, Free Cooling offers the largest potential for energy savings – in particular in cold and moderate climate zones. 

Direct Free Cooling

Direct Free Cooling

With Direct Free Cooling, filtered outside air is used to keep the data center cool. This brings huge potential savings of up to 90%. If the outside temperature rises above the supply air set point, either an integrated DX system with compressors or a separate chiller assumes the task of cooling the data center.


Indirect Free Cooling

Indirect Free Cooling

Direct Free Cooling brings challenges as well. With this cooling method, a large volume of outside air enters the rooms, so that extended temperature and humidity tolerances must be permitted. With Indirect Free Cooling, a system with a water/glycol mixture is used to cool the data center. Unlike with Direct Free Cooling, no outside air enters the data center with this cooling method. Air-conditioning systems with Indirect Free Cooling can be configured flexibly to suit requirements and are extremely efficient.

Indirect Dynamic Free Cooling

To further improve the efficiency of Indirect Free Cooling, STULZ has developed a dynamic control system for use with its own units. This system controls the mode in accordance with the current heat load in the data center and so considerably increases the number of operating hours in Free Cooling mode compared with other Indirect Free Cooling systems. Moreover, STULZ Indirect Dynamic Free Cooling has another operating mode – Extended Free Cooling – which further lengthens the time of Free Cooling mode and drastically reduces operating costs. The dynamic control cuts energy-intensive compressor cooling to a minimum.


STULZ units with Direct and Indirect Free Cooling

STULZ units with Direct and Indirect Free Cooling

CyberAir 3 DX

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.

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CyberAir 3PRO CW

CyberAir 3PRO CW is the result of consistent further development of our thoroughly successful CyberAir 3 series. The CyberAir 3PRO CW units are optimized for energy efficiency, low fan power consumption and "modern" high air and water temperatures.

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CyberCon

The STULZ CyberCon outdoor modular container system is designed for conditioning the air in a prefabricated data center. This modular cooling solution is ideal for rapid deployment and reduced construction time.

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CyberHandler

CyberHandler is a centralized cooling solution designed specifically to free up white space in the data center.

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STULZ units with Direct Free Cooling

STULZ units with Direct Free Cooling

MiniSpace EC

The MiniSpace precision air-conditioning system from STULZ cools small servers and equipment rooms with a heat load of up to 28 kW.

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Wall-Air Evolution

Wall-Air-Evolution units are installed outside the container, making the best possible use of the container space. The units boast Free Cooling and Mixed modes, and therefore achieve savings of up to 84 % on operating costs.

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Tel-Air 2

Tel-Air-2 units are designed for installation in Telecommunication containers and equipment rooms. The air conditioning units are plug and play and immediately ready for connection and use. All Tel-Air-2 units also feature a Mixed mode, which effectively combines Free Cooling with compressor operation, dramatically reducing operating costs.

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Split-Air

Split-Air-3 is the space and energy-saving version for the reliable cooling of telecommunication containers. The unit consists of an evaporator and a condenser unit, and is a plug and play design allowing immediate connection and use. The Split-Air-3 features Free Cooling and Mixed modes, and therefore achieves savings of up to 83 % on operating costs.

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Free-Air

To considerably cut the operating costs of base stations, these can be retrofitted with the Free Cooling unit STULZ Free-Air. Free-Air enables you to transform your existing system into an energy efficient solution at low cost. The return on investment for the retrofit is achieved especially quickly in containers where comfort air conditioning units are running 24 hours a day. The units are available in two versions for maximum versatility – FCL-IN for indoor installation and FCL for outdoor installation.

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STULZ units with Indirect Free Cooling

STULZ units with Indirect Free Cooling

CyberRow

CyberRow is the innovative air-conditioning system in which the air distribution takes a new direction – horizontal. The individual units are carefully integrated in the rows of server racks, greatly improving air distribution and taking cooling directly to the heat load.

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CyberCool 2

These units, which were designed and produced in Hamburg, boast a cooling capacity from 50 to as much as 1,400 kW and are available as an air-cooled version. Thanks to the diverse range of available options and the intelligent control technology, the new CyberCool 2 is one of the most cost-effective chillers.

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CyberCool CSI - Indoor Data-Chiller

CyberCool CSI is a compact chilled water generator for the direct liquid cooling of high-density server racks and computer tomographs, cooling capacity up to 100 kW, for indoors.

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CyberCool 1

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

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