Up-scaling and mainstreaming sustainable building practices in western China
Up-scaling and mainstreaming sustainable building practices in western China 

Boutiquehotel Stadthalle, Austria

Desigo by SIEMENS

Building name

Boutiquehotel Stadthalle

Floor area (sq mts)

2,271 million m2


Hackengasse 20

Vienna, Austria

Number of floors

4 in main building and 5 in Passive House extension

Building use


Built year (refurbished)


Short description of technologies and BEMS

Cooling system

Groundwater heat pump cooling system using a core activated slabs and auxiliary cooling via pre-cooling the air through the ventilation system.

Heating system

Groundwater heat pump cooling-system, using a core activated slabs/radiators and auxiliary heating via pre-heating the air through the ventilation system.

Ventilation system

The ventilation air is via the garden, this aids cooling in summer due to the reduction of the warmer city climate through the plants. The ventilation system for the passive house extension had a heat recovery of up to 92% depending on the relative humidity. The solar thermal panel system also preheats the ventilation system. The ventilation system uses a minimum of EU 4 filters. In addition it has a microprocessor unit which balances air volume according to changing running conditions in the hotel. It also registers for example dirty filters etc.

Renewable energy system

Geothermal heat pump/The heat pump is powered by a 13 kW peak PV System.

Hot water is provided by a 130m2 solar thermal panel system.




Lights are controlled by sensors in public spaces and in the guest rooms via the room key cards.

Air conditioning, heating and ventilation

The building systems are managed by a ‘Desigo’ building automation and control system with

PXC controllers

Web operation

The BUS system is an Instabus EIB system which regulates, controls and monitors the concrete core activation, water heating, cooling, ventilation, the solar panel system, buffer management and the groundwater heat pump as well as the lighting and solar systems.

The bus system also automatically switches the cooling and heating of the building depending on needs and outdoor temperatures.

In addition, the system helps to maintain the right balance between guest comfort and energy savings by monitoring and enabling the regulation of heating and ventilation based on actual demand or pre-defined schedules.

HVAC equipment and ancillary controls

The heating, ventilation and air-conditioning are programmed to match occupancy patterns and take into account room occupancy among other things via the guest key cards.

All data is visualised aiding the quick finding of deviation from estimates and well a for data recording.


Total cost of all control strategies (EUR)

2290 €/m2 (Total refurbishment costs including BEMS system)