Sparkasse Rosenheim, Rosenheim


Building data

Building contractor

Sparkasse Rosenheim-Bad Aibling


SAI Schleburg Generalplanungsgesellschaft mbH, Rosenheim

General contractor
Technical planning

TRANSSOLAR Energietechnik GmbH, Stuttgart

Building services:
Duschl Ingenieure GmbH & Co KG, Rosenheim

Fire safety:
HHP Ingenieure für Brandschutz GmbH, Berlin

Further project information

The 47.63 m high building was officially inaugurated by the Sparkasse in spring 2011 with an opening ceremony. After about five years of planning and redevelopment, the Sparkasse high-rise building in Rosenheim downtown finally has a new face and a pioneering energetic concept. Research, expert opinions, model calculations, simulations, and cost analyses were able to prove that the redevelopment of the 40 years old high-rise building would be the most reasonable measure from an ecological and economical point of view and would also generate a high surface yield.

An integral part of the concept is the decentralised building system which ensures maximum flexibility in use and comfort with its form and location. Below the ferroconcrete ceiling capillary tube mats were plastered which are later operated in combination with the use of natural coolants via groundwater wells and condensation cooling as well as low-temperature heating via a heat pump system. Free ceiling surfaces that can accumulate much heat during day, which in turn can be withdrawn during the night actively, ensure optimum temperature comfort in the rooms.

The intelligent combination of the double facade system with the cooling, heating, and ventilation systems reduces the energy costs to a fraction of the original value. The primary energy requirement is reduced significantly and reaches and ideal value of almost 100kWh/m²a. Through an intelligent façade control the building can adapt to the respective weather conditions optimally and also maximises the user comfort.

The Sparkasse high-rise building in Rosenheim benefits from the „return“ to traditional habits and climate concepts, but combines these with state-of-the-art technologies and findings and thus, virtually as a side effect, complies with the EnEV and the new energy pass for buildings in an ideal way. 

STG-BEIKIRCH technology

Usually, the essential contact point between technical building serve providers and manufacturers in the context of a construction project is the call for proposals with regard to technical building systems exclusively. This was not the case with TRANSSOLAR, the ClimateEngineering specialists from Stuttgart, and the STG-BEIKIRCH system suppliers. Both market partners accelerate the exchange of expertise where the most important point is to assess the various possibilities and many advantages of a natural ventilation of buildings through roof and facade elements in comparison to the use of mechanical ventilation and air conditioning systems, where the high energy costs are often in nor relation to the insufficient room climate conditions.

Natural ventilation and SHE control:
The trend is moving on from hermetically sealed, fully air conditioned areas to rooms in which each user can individually change the local room climate. In the Rosenheim Sparkasse high-rise building, the regulated double facade, among other functions, serves to let the supply air flow in in a controlled manner for the decentralised supply air units, and to reduce the pressure differences in front of the primary facades for expanding the window ventilation possibilities. Other functions depending on the season and the outside temperature are the preheating of the supply air in winter and the rear ventilation and passive cooling of the gap between both facades in summer.

An enormous cost benefit is also achieved by the additional use of the SHE control windows, which are required anyway, for ventilation purposes. Due to the room height and the solar loads to be dissipated, the access and atrium areas are in particular suitable for natural ventilation with the installed SHE control system. Since these areas mostly serve as the company’s figurehead, the comfort in these areas is especially important. In this case, comfort is not only about temperature, but about measurable, psychological properties of the fresh air, such as CO2 content or air movement.

Control centrals with LON
Adding to this is the safety-oriented actuation of the windows in case of fire. The full opening of the dampers and thus the sealing of a storey reduces the danger of a fire spreading through the building. To fulfil all requirements, two types of dampers are used in the Sparkasse building: dampers which open in steps of about 10% (wind ventilation dampers) and dampers which are either open or closed (summer ventilation dampers). Both types are actuated by special STG-BEIKIRCH linear motors and controlled by LON technology control centrals.

Photo source

Jens Weber Fotodesign


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