• Act responsibly. Enable sustainability.
  • 2015 Corporate Responsibility Report
2015 Corporate Responsibility Report

Energy-efficient buildings

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Within the scope of our climate protection target, we work diligently to continue to reduce our energy consumption and the carbon footprint associated with it. Efficient facility management plays a key role in these efforts. Around a quarter of our energy consumption throughout Germany can be attributed to usage of our buildings, for example.


  • Reducing energy consumption


  • Optimizing energy use in buildings
  • Optimizing space management
  • New working models, e.g. Future Work


  • Energy Consumption ESG KPI
  • Biannual energy report
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Our facility energy management activities can be broken down into "heating energy" and "electricity consumption." We have defined sub-targets for each of these areas to help us attain our climate target in Germany. Progress is measured twice a year.

Two approaches are involved in achieving our sub-targets. One of these is to reduce our office space. Apart from staff restructuring measures, we are introducing new office workplace concepts to optimize space usage. Another focal point is increasing the energy efficiency of our processes. For this we use an energy management system compliant with the international standard ISO 50001. We identify the need for improvement by using specific indicators such as "kilowatt hours per square meter," "energy consumption at midnight" or "peak loads" to compare similar facilities. The energy management system is run by Power & Air Solutions img.

Heat and hot water
We use approximately 600 GWh of heating energy throughout Germany each year, primarily by using gas and heating oil as well as district heating. That is the same amount of energy needed to provide around 100,000 newly built apartments with heat and hot water. To reduce consumption, we calculate the basic renovation work needed at our facilities, conduct efficiency analyses and focus on necessary and particularly efficient measures within the scope of the available budget such as:

  • Optimizing heating systems
  • Using condensing boiler technology to replace old heating systems and pumps
  • Recovery of waste heat produced by data centers
  • Using cogeneration plants

Our real estate management departments are responsible for measurements, analyses and developing appropriate measures. In 2014, they coordinated the installation of heating systems that use waste heat generated by IT systems at three of our data centers.

Our employee workstations, lighting, and building technology, including pumps, ventilation, cooling and elevators, are responsible for the largest part of electricity consumption in our buildings. We focus our energy conservation measures on the following areas:

  • Using LED lighting and motion detectors in underground parking structures and hallways
  • Using state-of-the-art pumps and fans
  • Switching off building technology outside working hours

In 2015, we equipped 41 elevators at eight locations with modern LED lighting.

Our facility energy management measures all work toward the same goal: reducing our energy requirements to help us reach our climate target.

Smart grid img solutions have the potential to optimize the energy requirements of buildings, reducing costs as well as CO2 emissions. We developed an innovative energy concept based on this technology for one of our sites in Berlin in 2015. The concept revolves around a micro smart grid.

We are planning to use two CHP plants with high thermal energy storage capacity, which are scheduled to be installed by the end of 2016. The waste heat produced by the CHP plants will be used to heat a neighboring school and gym. We expect the new system to not only cut back on costs but also reduce CO2 emissions by up to 800 metric tons a year.

We are increasingly relying on solar energy to power our technology sites. In 2014 we decided to equip 600 of our sites with photovoltaic units over the next several years. Our internal energy service provider, Power and Air Solutions, is responsible for installing the units.

In early 2016, Deutsche Telekom was operating solar power units at a total of 307 switching centers in Germany. This is expected to reduce our carbon footprint by 932 metric tons per year and move us closer to our climate target for 2020.

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