GOOD PRACTICE EXAMPLE

Country:	Upper Austria
Product group:	building components
Name of the Institution:	Energiewerkstatt

Overview

The company is an engineering company specialised in planning wind farms but provides also services in consulting (energy efficiency, renewable energy sources).

In 2003 & 2004 a new office building (380 m²) was constructed in Munderfing which aims at 100% energy supply from renewable energy sources.

Specifications of the Institution

Organisation of the procurement

For the planning and implementation of the new office building, the following criteria were set:

• 100% energy supply from renewable energy sources
  
• environmental friendly construction materials
  
• low energy consumption
  
• timber construction, focus on local/regional building materials
  
• preference for local/regional suppliers

Measures

The office building was constructed as low energy building with for example the following U-values for building components:

• building shell: 28 cm insulation, U-value = 0.147 W/m²K
• roof: 30 cm insulation, U-value = 0.147 W/m²K
• windows: triple glazing, U-value = 0.7 W/m²K
• air tightness: nl50 = 0.3 1/h

Only environmental friendly construction material was used, e.g. the building is built in timber construction using cellulose insulation material.

The building is to 100% supplied by renewable energy sources:

• 3.1 kWp PV-plant
• The remaining electricity consumption is covered by wind energy (the company holds shares of a wind park)
• 22 m² solar thermal collectors for covering the hot water consumption and seasonal heating
• 15 kW pellets heating boiler

Success

The low energy consumption office building, which is supplied to 100% by renewable energy sources, was constructed at very low costs.

Further publicly available info about the concrete project