Vienna - Austria

Austrian postal services headquarters

Nearly Zero Energy Office Building

Integral planning, control optimization & pre-built Commissioning

The owner’s focus was to drastically shorten the commissioning phase and to really obtain a high performance NZEB-building as designed, meaning an outstanding energy performance and high levels of comfort.  

Therefore it was important that all relevant parties work together from the very beginning and keep collaborating through the construction until commissioning and operation. 

The construction project was framed with a research project to act as a test bench for energy-efficient automation and control of buildings

Out teams’ focus were the development and optimization of control strategies and data analysis during the first year of operation. 

The great results and the client`s satisfaction  at the end of the project made this a real highlight-project for us!

Realisation 2017, 49.000 m² incl.5000 commercial space (gastro, supermarket, shops)

Architect: Schenker Salvi Weber & feld72

Control strategy optimization and virtual testing on real hardware

Project brief


Significant time reduction of the commissioning phase

Assurance that the nearly zero energy building really performs as planned

Development and optimization of control strategies with focus on part load conditions for all air conditioning systems, concrete core activation and especially free cooling


Scientific planning support from early planning stage until commissioning involving representatives of ALL project partners (Owner, facility management, HVAC planner, building physics, control engineers, etc.)

Application of the novel Hardware in the Loop (HIL) approach as part of quality assurance measures allowing the control strategies to be tested on the real hardware prior to installation

Development and optimization of control strategies for all systems using dynamic thermal simulations. The results were lateron used by the control engineers and facility management

Our Role

As part of AIT:

Reviewing the highly complex dynamic thermal system simulations

Advising the owner in the first year of operation for continuous improvement and quality assurance

Conducting monitoring data analysis and presenting solutions for increased energy efficiency and comfort to the owner

Project Partners

More of our work

Visualization Vienna 22 © Renderings: Delugan Meissl Associated Architects

Geothermal simulations

Dynamic thermal simulations of the ground to analyse the energy gain from underground structural walls.

International Summer University

Award winning Green.Building.Solutions. teaching sustainable construction to Master and PhD students.

Mosque in Kasachstan.© David Michulec NEUBAU

Positive Energy Mosque

First mosque in the world with a positive electricity balance in the harsh climate of Kazakhstan.

Austria Campus ©SIGNA

LEED Simulations for a campus

Dynamic thermal simulations for five building blocks including its’ own district heating & cooling network