Buildings

Heidelberg, Germany

Energy efficiency in Heidelberg buildings reduces emissions

What is it?

Heidelberg is at the forefront of environmental protection in Europe and has cut CO2 emissions by over 15,000 tons per year in municipal buildings since 1993. The city has developed a comprehensive energy management system for local authority properties and has been involved in a wide range of projects for sustainable development.

The 2004 Climate Protection Plan and 2004 Energy Strategy lay down mandatory standards for buildings that far exceed national requirements. All of the city’s targets are developed in consultation with local stakeholders through the “Heidelberg Climate Protection and Energy Circle”. The city has achieved numerous international awards.

How does it work?

The Heidelberg Energy Saving Regulation aims to promote energy efficiency and renewable energy in new and retrofitted buildings. For example, one initiative with new solar thermal modules on rooftops has saved 320,000 kWh of heat since 1993; other solar thermal installations totalling nearly 5000sq metres are used for public swimming pools.

Developers must ensure that non-municipal buildings have high levels of energy efficiency, in order to receive planning permits. Some developments are completed with heating requirements far in advance of the city’s official requirement for new housing.

Key results

From 1993-2005:

• Emissions from municipal buildings were reduced by 35%, from 37,717 tCO2 in 1993 to 21,966 tCO2 in 2005
• Estimated 225,000 tCO2/year saved in private households, business, industry and transport
• Between 1999-2002 emissions from University buildings cut 13%
• 7 GWh of electricity supply purchased from renewable sources

Next steps

Heidelberg aims to continue making progress towards its target of a 20% cut in CO2 emissions by 2015. Actions will include new projects that aim to increase the share of renewable energy sources in the city.