GreEnergieausweis AT - Ways of integrating greenery into the Austrian Energy Certificate

Adaption of the calculation models in the energy certificate in such a way that the greening of buildings can be depicted as realistically as possible and assessment of the acceptance of implementation by relevant stakeholders.

Short Description



Starting point / motivation

Climate change as well as the resulting increase in hot days are one of the greatest challenges of our time. Summer overheating is becoming increasingly critical, especially in urban areas. Due to the high degree of sealing, low vegetation density and lack of air circulation, heat islands are created, which lead to severe health problems for the residents. One of the approaches to decreasing the negative impact suggests different greening measures, such as greening buildings.

Contents and goals

The energy performance certificate is a well-known and important means for comparing the energy efficiency of buildings. With the energy certificate, it is possible to show the effect of greening buildings through the U-value. Alterations in the U-value result in a change of the heating requirement and other characteristic values.

In future, the effect of greening buildings on summer overheating could be mapped. The influence of greening on the microclimate could be estimated by means of simulations and measurements, allowing the resulting change in the local climate to be considered in the calculations of the energy performance certificate. It is also conceivable to include the influence of greening buildings on solar systems.

The integration of greenery into the energy performance certificate can in any case be seen as a useful means to force the implementation of greening in buildings and simultaneously raise awareness among relevant stakeholders on the subject.

The aim is, on the one hand, to adapt the calculation models in the energy performance certificate so that the greening of buildings can be depicted as realistically as possible, and on the other hand to estimate the acceptance for implementation by the relevant stakeholders.


Through workshops as well as the involvement of relevant stakeholders, an initial assessment of the acceptance and feasibility of such changes in the energy performance certificate can be estimated.

The applicant is the deputy chairman of the following technical committees of "Austrian Standards International - Standardization and Innovation":

  • ON-K 175 (thermal insulation of buildings and building components)
  • ON-K 141 (air conditioning and ventilation technology) and
  • ON-AG 235 (economic use of energy)

There, the calculation methods, regulations and technology of the energy-efficient construction are constantly developed.

Therefore, the applicant has many years of experience in helping to shape the standards that provide the basis for the calculation of the energy performance certificate.

Expected results

The aim of the project is to ensure, that the approaches to the study are not only realistically feasible, but also discussed in the standardization committees with the relevant actors and key players.

Project Partners

Project management

Schöberl & Pöll GmbH

Project or cooperation partners

  • GRÜNSTATTGRAU Forschungs- und Innovations GmbH
  • University of Natural Resources and Life Sciences, IBLB Institute of Soil Bioengineering and landscape Construction

Contact Address

Schöberl & Pöll GmbH
DI Klemens Schlögl
Lassallestraße 2/6-8
A-1020 Vienna
Tel.: +43 (1) 726 45 66-14
Fax: +43 (1) 726 45 66-18