Life cycle assessment - Sustainability - About us - Concept Wiesner-Hager

Life cycle assessment

Company-related life cycle assessment

Since 1992 Wiesner-Hager has prepared yearly input-output analyses. The first full company-related life cycle assessment acc. to EN ISO 14040 was established for the financial year 2009/10, including a quantifiable ecological impact assessment "cradle to gate", examining the impacts of the entire enterprise at all production sites.

These data are the basis for establishing the Environmental Product Declarations (EPD) acc. to ISO 14025, which are certified by TÜV Austria (the Austrian technical control association) and are equivalent to Type III declarations.

Company-related life cycle assessment

The company-related life cycle assessment investigates the environmental impacts associated with the enterprise and its network of suppliers. First, the life cycle inventory analysis establishes all material, energy and elementary flows - the so-called inputs. These will leave the factory afterwards as outputs in the form of products,waste, emissions, and waste heat. The most important criterion of the life cycle inventory analysis is the difference between the totals of inputs and outputs. The smaller the deviation, the more exhaustive and more accurate the life cycle inventory analysis has been made.


The impact assessment is based on the scientific CML process, the method of influencing factors. The following environmental consequences are analysed and shown: the greenhouse effect (GWP), the depletion potential of the stratospheric ozone layer (ODP), the summer smog creation potential (POCP), the acidification potential of soils and water bodies (AP), the nutrification potential of soils and water bodies (NP), as well as the depletion of abiotic resources (ADP).



Apart from the materials and their masses the energy flows have to be established and recognized.

Abiotic resource depletion Abiotic resource depletion
Acidification Acidification
Global Warming Global Warming

Product-related life cycle assessment

Environmental Product Declarations

Product-related life cycle assessments are represented in the form of so-called Environmental
Product Declarations, briefly EPD. The process to calculate the required data is audited annually by TÜV Austria (the Austrian Technical Control Association), and system conformity is confirmed by a certificate acc. to ISO 14025. Product-related life cycle assessments consider the entire life cycle of a product within the limits from raw material production to disposal. In this process not only the burdens of the upstream supplier chain and later disposal, but also the environmental impacts ascertained in the company-related life cycle assessment are translated to the individual products according to the causative principle. A process developed together with environmental scientists has made it possible to generate an EPD of any product and its variants at the touch of a button using program algorithms implemented in SAP. On request, we'll be happy to provide this to our customers and any interested party as a decision for buying. Additionally, we provide numerous EPDs of standard product configurations in the download area.

In these Environmental Product Declarations the following impact categories are disclosed:


LCI indicators:

  • Primary energy required (non-renewable)
  • Primary energy required (renewable)
  • Water exploitation
  • Mining waste
  • Municipal solid waste
  • Special waste

Environmental categories:

  • Greenhouse effect (GWP, Global Warming Potential)
  • Destruction of the stratospheric ozone layer (ODP, Ozone Depletion Potential)
  • Summer smog creation (POCP, Photochemical Ozone Creation Potential)
  • Acidification (AP, Acidification Potential)
  • Overfertilization (NP, Nutrification Potential)
  • Depletion of non-renewable natural resources (ADP, Abiotic Depletion Potential)


 Example product-related life cycle assessment

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