Unterföhring Sports Complex

Energy and climate concept:
For the new sports park in Unterföhring, a concept has been developed that reduces energy consumption and the use of natural resources, and is therefore sustainable and holistic. An optimised approach to building design and its technologies was essential to minimise the use of primary energy, investment and operating costs.
The architectural design preceded the basic energy considerations. The architecture of the bath is such that the building cuts into the ground and opens to the south through a large glazed façade with a roof overhang, so that transmission heat losses are reduced to a minimum and passive solar gains can be used optimally.
To meet the building's energy needs and optimise the use of existing resources (e.g. heat recovery from waste streams), additional optional measures (e.g. solar collectors on the opaque parts of the south façade and shading elements) for the use of renewable energies have also been considered. The result is a holistic concept that takes local conditions into account.
The air from the warm zones of the technical area is used to preheat the outdoor air entering the bath area and to prevent the heat exchanger from freezing. Likewise, the warm pool water and the wastewater from the showers first pass through a heat-recovery stage before being discharged. These measures harness existing energy resources, saving energy while reducing operating costs. A solar-thermal system can complement the energy-supply concept of the sports park.
The climate concept for the bath area provides for a distribution of warm air through existing rest zones adjacent to the main pool. Through floor-level openings, the air circulates over the entire surface and is heated, so that the floor decks are also warmed. At the same time, the pool itself is moderately tempered. Optional additional surface heating can improve thermal comfort in the shared spaces, and floor heating is also used along the façades for peak loads and to prevent cold-air down-draughts. For warm summer periods and to support efficient operation, opening windows are provided in the walls and the roof, allowing natural ventilation. For swimming events, temporary local glare-protection measures are included in the planning.