Sozial100%Erneuerbar: 100% renewable heating and cooling supply in social housing - the demonstration project Käthe-Dorsch-Gasse

100 % renewable (on-site) heating and cooling supply in social housing while achieving good living comfort. Implementation, monitoring and optimisation of an overall heating and cooling system that has not yet been implemented in this combination (especially in social housing).

Short Description

Starting point / motivation

The creation of affordable housing versus the implementation of climate protection measures represents a pronounced area of tension, especially in social housing. In the project Käthe-Dorsch-Gasse, a large-volume residential building with approx. 300 residential units, built by the developer WBV-GPA - Wohnbauvereinigung für Privatangestellte, this tension is proactively addressed.

Contents and goals

The overall goal of the project "Sozial100%Erneuerbar" is to implement a 100% renewable (on-site) heating and cooling supply in social housing while achieving good living comfort. Special emphasis is put on high multiplicability and scalability.

Innovation contents and targeted results

Implementation, monitoring and optimization of a system of heating and cooling supply, which has not been implemented in this combination before, especially in social housing. This system consists of the following elements:

  • Geothermal energy with borehole field regeneration
  • Heating and cooling via building component activation
  • Free cooling
  • Domestic water heat recovery
  • Photovoltaic system to cover the electricity demand of the building services equipment as well as the general electricity demand.

Geothermal energy and building component activation in particular have never before been implemented on this scale in social housing. The project pursues the goal of making these technologies affordable and acceptable in social housing.

To achieve a proper energy balance of the borehole field, the following technologies are applied:

  1. asphalt collectors;
  2. roof-mounted (unglazed) flat-plate collectors;
  3. waste heat from apartment cooling.

Asphalt collectors and unglazed flat-plate collectors are of particular interest as innovative and cost-effective solutions for social housing. This builds on the results of the „City of the Future"-project "Heat Harvest". Since in thermally optimized buildings domestic hot water is the real driver of heat demand, there is a great need for multipliable solutions in this respect. In the project "Sozial100%Erneuerbar" a system is to be installed that has not yet been implemented in social housing.

The project places a special focus on the involvement of future residents with the aim of making individual comfort, a high quality of life, but also the implementation of climate-relevant energy supply „liveable" for residents.


Advisory support in the implementation planning of the building services system. The socio-scientific accompaniment is carried out in particular through semi-structured interviews and by means of workshops. Recording and regular evaluation of all relevant data (technical monitoring). Economic analyses and comparisons with asphalt collectors.

Expected results

A sophisticated building services implementation concept with integration of the planned innovative technologies with integration of an asphalt collector into the overall energy concept will be available.

Economic analyses: Classification of the implemented project in comparison with similar projects and a performance comparison of solar collectors/asphalt collectors.

Project Partners

Project management

Schöberl & Pöll GmbH

Project or cooperation partners

  • Wohnbauvereinigung für Privatangestellte Gemeinnützige Gesellschaft mit beschränkter Haftung (WBV-GPA)
  • AIT - Austrian Institute of Technology GmbH

Contact Address

Schöberl & Pöll GmbH
Lassallestraße 2/6-8
A-1020 Vienna
Tel.: +43 (1) 726 45 66