Hrvatski Telekom and Siemens optimize data center using AI technology

2.2.2026

• Siemens in Croatia has optimized Hrvatski Telekom’s data center using a resource-efficient, artificial intelligence-based cooling technology known as White Space Cooling Optimization
• An intelligent sensor network and AI-driven cooling management ensure high efficiency

Siemens has successfully completed the White Space Cooling Optimization (WSCO) project in cooperation with Hrvatski Telekom (HT), Croatia’s leading telecommunications company. Thanks to an intelligent sensor layout and AI-based cooling control, HT’s data center in Zagreb now operates more efficiently and sustainably.

Martin Lang, Head of Smart Infrastructure Buildings business unit, Siemens Austria, said: “Going forward, Hrvatski Telekom will use an AI solution with machine-learning capabilities that dynamically manages the cooling process in the data center. Energy savings in the six-figure euro range are expected because of the WSCO solution, along with the avoidance of potential failures caused by excessive temperatures.”

Ivan Visković, Director of Core Network and Services Sector, Hrvatski Telekom: “Thanks to the WSCO solution and dynamic AI-based cooling, we have achieved significantly more efficient cooling of IT and network equipment in our largest data center. The implementation has led to improved temperature control in system rooms, the elimination of so-called hot spots, reduced operating hours of cooling units, and lower maintenance costs.”

White Space Cooling Optimization (WSCO) consists of both technical and process components. Thermistors measure temperature changes on servers and network racks based on electrical resistance. The technical component includes wireless sensors and control modules, an AI engine, and a user interface. From a process perspective, an optimization loop is used to ensure continuous improvement. The process begins with an analysis based on data collected by sensors monitoring current operating conditions. WSCO then uses artificial intelligence to automatically regulate fan airflow and identify issues. Cooling processes are dynamically adjusted based on the acquired data. Continuous system operation and machine learning enable the elimination of up to 99% of so-called hot spots in a data center. In addition to ongoing optimization, the solution also improves the quality of preventive maintenance by identifying faulty components.

Hrvatski Telekom is the leading provider of telecommunications services in Croatia, offering fixed and mobile telephony, wholesale services, internet, and data services.