GENERAL INFORMATION

P 18 – Urban Quarter on Prießnitzweg in Stuttgart, Germany

Construction year: 2024

Climate zone: Cfb - Temperate oceanic climate

70374 Stuttgart, Germany

Architect

AH Aktiv-Haus Gmbh
Owner

Stuttgarter Wohnungs- und Städtebaugesellschaft mb

Architect

AH Aktiv-Haus Gmbh
Owner

Stuttgarter Wohnungs- und Städtebaugesellschaft mb

Plus Energy Quarter KWF 40 +

This is Germany‘s largest sustainable modular timber building project, with 6 flat roof Buildings with 330 Employee apartments (residential units) for Klinikum Stuttgart.

The amount of floors per building amounts to 4 or 5 floors.

The buildings consist of a total of 212 Timber Modules in timber-frame construction with basement levels underneath as well as an underground car park with parking spaces and prepared charging stations for electric vehicles. The prefabricated modules in timber frame construction save 75% in material mass. Thanks to the lighter building, the basement floors could be built more delicately, thus eliminating the need for 5,500 m³ of concrete.

Building gross area & Net area

Gross floor: 24,478 m², Net living area: 10.057 m²

Number of floors above ground and below ground

Below ground floors: 1-2 / Above ground floors : 4-5

Average net area per dwelling

30,47m²

Types of outdoor and common areas

Extensive green roofs, outdoor green and communal areas, 4 buildings are equipped with generally accessible roof terraces.

Charging station (yes/no)

Yes

Other relevant aspects

Urban living in an attractive neighbourhood with generously laid out green and communal areas.

installation prefabricated timber modules

Technology solution sets

Heating, cooling and ventilation

The buildings are equipped with centralized heat pumps.

Building Technology	Type of System	Technology	Distribution System
Primary Heating System	Centralized	Air source heat pump Exhaust air heat pump Solar assisted heat pump (with thermal solar panels) Water source heat pump	Radiant floor
Ventilation		Natural ventilation with opening automation
Domestic Hot Water	Integrated with the heating system Decentralized

Renewable energy production

Primary energy demand totals to 23,3 kWh/m2a. Self-generation amounts to 119.247 kWh/a, while Self consumption amounts to 190.128 kWh/a

The yearly PV (or other RES-based technologies) energy production amounts to 119.247 kWh/a.

Electrical storage battery:

Yes
Photovoltaic rooftop system:

Yes

Energy Renewable Technology	System Type	Main PV Panel orientation	Total Installed Capacity (KWP)
PV Systems (KW peak installed, surface area, total or per m²)	Roof integrated PV system Facade integrated PV system External structures integrated PV system (balcony, canopy, garage, parking places etc.)	East South West	441 kWp therm

Envelope technology

Building envelope

The GHG reduction amounts to 1,815 tonnes of CO² due to concrete reduction, 6,700 m³ of wood is used throughout the project.

1 - 3

Walls are built to isolate the building, keeping the indoor cool in summer and warm in winter.

Wall	Material Used	U Value
Wall type 1		0,14 W/(m²K)

The roof features an integrated PV system.

Roof	Material Used	U Value
Roof type 1		0,13 W/(m²K)

Windows are manually openable, mobile shading systems that can be operated by the residents are included.

Window	U Value	G Value	Shading Type
Window type 1 & 2	0.8W/m²K	38 %

Culture and climate

Residents' cooling needs met

Several strategies are used to ensure that residents needs are met. For example, adding mobile shading systems, incorporating fixed shading systems and maintaining green areas nearby help ensure that the cooling needs are fulfilled.

Culture Climate Survey

Discover more about cultural aspects

Peb tips for designers by designers

How to achieve successful Plus Energy Buildings

Advice on building technologies

Technologies should always be used that are user-friendly for the tenants and low-maintenance for the operator.

Performance challenges

Our aim with this project was to come as close as possible to the goals of future building practices defined by Werner Sobek. It is about minimising Co2 emissions during construction, during the service life of the buildings and when the buildings are dismantled, in which the components can be reintegrated into the circular economy. In collaboration with everyone involved in this project and the client who commissioned this ambitious project, we have come close to achieving this goal as close as technically possible. The biggest challenge was to realise these goals within the budget set by the client.

External services

We used the external services of a building physicist to calculate the building envelopes.

Resident interaction

Technologies should always be used that are user-friendly for the tenants and low maintenance for the operator.

Building certification process

A certification is mandatory in this region. The commissioning of experienced and competent service providers in this field is fundamental. External experts were hired for this process.

Cost optimisation

In order to optimise the costs and avoid additional costs arising in the further planning process, we recommend integrating the specialist planners into the planning process as early as possible.

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