The clear cubic form of the 23 story, 840,000 ft² German Stock Exchange building offers the optimum surface area to volume ratio for exceptional low-energy performance, and is the result of extensive building massing and optimization studies. The building enclosure provides a high level of thermal comfort and energy performance through operable triple-pane windows that allow for natural ventilation for maximum user comfort for the facility’s 2,400 employees.
Baumann Consulting performed extensive building and system modeling in support of the design and optimization of the overall concept, single systems, components, and control strategies and sequences from early design phases on. These analyses resulted in calculated energy savings of more than 40% according to ASHRAE 90.1-2007 and over 55% primary energy savings according to the German Energy Efficiency Standard.
Baumann also served as the Commissioning Authority (CxA) for the project, and performed Fundamental and Enhanced Commissioning services in accordance with LEED requirements. In addition, Baumann performed energy and performance monitoring according to the International Performance Measurement and Verification Protocol (IPMVP), including calibrated simulation to verify energy efficiency performance for 12 months after building handover to the owner.
A combined heat and power plant on the roof provides about 60% of the building’s electricity demand. The energy is used for space heating and firing absorption chillers to provide space cooling. Hot water can be stored in tanks for peak load management. Solar collectors provide the domestic hot water used for bathrooms and kitchens. Occupied spaces are conditioned by radiant heating and cooling in combination with dedicated outdoor air systems, or natural ventilation as desired. Integrated control systems guarantee that all systems operate only when needed and perform to the highest possible efficiency standards.
Baumann leveraged extensive experience and expertise working on projects of similar scale and scope in the U.S. and abroad to successfully achieve Platinum certification under the LEED for New Construction (LEED-NC) version 3.0 rating system for this innovative project.
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