Logo Oventrop GmbH & Co. KG

Former post and telegraph office
Berlin, Germany

Foto: © Tobias Arhelger / Shutterstock
Type Residential building
Project New building
Execution 2016-2018
Designer Serabag – Gesellschaft für Projektentwicklung Baubetreuung und Bauausführung mbH, Berlin
/ Investor
Biotronik Vertriebs GmbH & Co. KG, Berlin

Former post and telegraphic office

Since 2012, the old Imperial Post Office Building on Oranienburger Straße in Berlin-Mitte has been owned by the medical technology manufacturer Biotronik. The building was completed in 1881. Founded as a residence for postilions, over the years not only the building change but also its use. Today, the company, which is one of the leading companies in the field of cardiological technologies, uses the headquarters as a representation area, among other things. In 1975, the building was listed as a historic monument and has been an integral part of the cityscape ever since. The manufacturer Biotronik bought the building in summer 2012. Lectures, training courses and exhibitions of the globally active group are implemented there. In addition, new offices have been created for the staff in the three-storey building with its two wings.

Historical objet with modern technology

As part of the modernisation, especially from 2016 to 2018, modern heating and hot water technology products from Oventrop also moved into the historic building. In addition to 225 new Uni SH thermostats, 27 pinox thermostats were used to enable efficient regulation of the room temperature. The latter variant is designed by Oventrop for use on bathroom radiators and its design is intended to be reminiscent of common single-lever sanitary fittings. In addition, double regulating and commissioning valves from the Hydrocontrol series have been installed in the building. In this way, it was possible to balance the pipes hydraulically so that the heating now runs according to modern standards.

Hydromat differential pressure regulators were also used. These are proportional regulators that operate without auxiliary energy. They keep the differential pressure in the controlled section constant within a proportional band required for control purposes. Special advangage: The nominal value of the Oventrop differential presure regulator can be infinitely adjusted. Thus the calculated values can be transferred to the system without major deviations.

Hygienically safe potable water

In buildings where the number of occupants fluctuates, the use of fresh water stations is a good idea. This ensures that the potable water maintains an appropriate standard of hygiene: Two Regumaq XZ-30 stations were therefore used. This electronically controlled Oventrop assembly prepares the potable hot water using the continuous flow principle. The necessary energy for this is supplied by a buffer storage cylinder. Depending on the temperature and the volume flow on the potable water side, the circulation pump on the heating side is speed controlled. All necessary components of the product group are pre-assembled, ready for connection. Circulation pipes were installed so that stagnation does not occur in the long paths of the pipes and so that the formation of legionella is not encouraged. These are also supplied by the Regumaq XZ-30 stations. Aquastrom VT valves were installed in the building to ensure that the pipes function in accordance with the regulations. The thermostatic valves with presettable residual volume flow have two functions. On the one hand, they are intended to keep the temperature in the system constant by means of thermal control. On the other hand, they are used for hydronic balancing between the individual circulation risers.

Communication with the building automation system

The entire heating system can be controlled by the building automation system. The DynaTemp control unit was specifically used for this purpose. Here Oventrop products and systems with sensors and actuators form the basic components in the room or field level. They are connected to the DynaTemp control unit by means of bus-based modules. These automation units and their software are adapted for the control and regulation tasks of heating, sanitary and cooling systems.