Germany's Efficient Homes

Climate Solutions Special Issue
A version of this article appears in the Climate Solutions Special Issue issue of Home Energy Magazine.
Click here to read more articles about Retrofit
January 01, 2008
German energy agency, dena's, Efficient Homes project is tapping into substantial energy savings through the retrofits of existing buildings.
As energy prices on the world market rise and the debate on how to address climate change intensifies, energy-efficient home retrofits have become a vital issue in Germany. The residential building sector consumes the largest proportion of site energy used in Germany, and the lion’s share—about 75%—of this use is attributable to space heating. Consequently this share has to be reduced radically for overall energy consumption and carbon dioxide (CO2) emissions to decline. Existing buildings are of particular importance. At present, older buildings use on average 225 kilowatt-hours per square meter (kWh/m2) (71,325 British thermal units per square foot (Btu/ft2)) annually—or 3 times the energy required to heat a new building. Yet despite rising energy prices, retrofit projects are still not fully exploiting potential energy savings. Currently, over half of the potential savings that are economically feasible remain untapped after a renovation.

To read complete online articles, you need to sign up for an Online Subscription.

Once an order has been placed there is an automatic $10 processing fee that will be deducted with any cancellation.

The Home Energy Online articles are for personal use only and may not be printed for distribution. For permission to reprint, please send an e-mail to

Earn BPI CEU credits
Home Performance with EnergyStar
SPONSORED CONTENT Home Diagnosis: The First TV Series about Home Energy! Learn more! Watch Video
Email Newsletter

Home Energy E-Newsletter

Sign up for our free monthly

Harness the power of

Get the Home Energy