Frankfurt am Main

Building technology Hafenbogen


In the financial and service metropolis of Frankfurt am Main, two subsidiaries of the Elevion Group jointly managed a major project as overall technical building equipment providers: For the Hafenbogen office complex, Rudolf Fritz GmbH and Efficient Technical Solutions GbmH ETS implemented the electrical engineering as well as the heating, air-conditioning, sanitary, sprinkler and I&C technology for the 12-story building.


Two project managers and site managers were assigned at ETS and Rudolf Fritz respectively in order to be able to manage the coordination effort effectively, and the teams were put together while, as so often happens, the deployment date was pushed back due to various delays. In accordance with the high fire protection specifications, the building was equipped with a smoke protection pressure system (RDA), which ensures that the escape routes are kept free of smoke in the event of a fire by the targeted supply of compressed air. Furthermore, the Rudolf Fritz managers installed - also in the area of the underground car park - a dual voice system which, in the event of a necessary evacuation, controls the relevant parts of the building via around 1,300 installed loudspeakers and regulates the necessary procedure by means of voice announcements. A large part of the electrotechnical work required the low-voltage installation with around 270,000 meters of cables and lines, 2,800 installation devices, 900 floor tanks and 2,300 lights. 

The two central elements of the heating and air-conditioning, plumbing and sprinkler systems, which were carried out by ETS, are located in the basement and on the roof of the 46.5-meter-high structure. The heat supply is provided by the existing district steam network of the energy suppliers of the city of Frankfurt by means of indirect supply. The heat is transferred and converted into building heating energy using a heat exchanger system in the technical room provided for this purpose in the basement. During the summer months, the 1,100 kW district heating system also serves to operate the absorption cooling machines. During the winter months, a component heating system tempers the office units by means of concrete core activation through plastic pipes through which heating water flows. A pleasant indoor climate in the office areas and staff restaurants is provided by ceiling-oriented heating and cooling sails, which can be heated or cooled at the desired output and controlled section by section by means of MSR.


Neue Mainzer Str. 52
60311 Frankfurt am Main
From the fitters to the site managers to us project managers, everyone showed team spirit.

Key Facts

  • District heating steam heating with total heat output 1,100 kW

  • Absorption cooling machine (salt lithium bromide) capacity 1,000 kW

  • Air-cooled cooling machine capacity 1,000 kW

  • Comfort ventilation system total 82.000 m2/h

  • Main power supply

  • Low voltage installation

  • Emergency power supply system with a capacity of 400 kVA in container design

  • Safety lighting system with approx. 950 luminaires

  • Comprehensive fire alarm system with approx. 1,600 smoke detectors

  • Voice alarm with central technology

  • Combined video intercom and access control systems

  • Data network with approx. 55 server cabinets

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Rudolf Fritz GmbH