This energy retrofit is one of three such climate-protection
projects undertaken by Freiburger Stadtbau GmbH in Weingarten.
The old balconies of the 1960s-era building have
been enclosed to reduce thermal bridges. An overall thermal
cover surrounds the building. Furthermore, triple glazing
and controlled-heat recovery ventilation systems will
support superior energy efficiency and simultaneously provide
ideal comfort to occupants. Total energy consumption
has been cut by approximately 78%. The building is heated
by a nearby gas-fired co-generation power station.
Badenova has modernized the Weingarten combined heat
and power plant by adding six new co-generation units,
three heat pumps and three boilers. It heats 20,000 households
and provides 16,000 with electricity. The new cogeneration
units were installed in July 2012, and final modernization
measures will be completed in November 2012.
The saved CO2 emissions are be calculated by mid 2013.
Since 2008, Badenova has published annual environment
and sustainability reports.
Freiburg’s largest solar plant, occupying 17,900m², is located
on the former Eichelbuck waste disposal site. The solar
facility was initiated by the City of Freiburg and is run by
ASF Solar GmbH und Co. KG, founded in early 2011. The
company is an affiliate of Abfallwirtschaft und Stadtreinigung
Freiburg (ASF), a waste management company, and
Badenova, a local energy distributor. The solar plant has a
total output capacity of 2.57 MWp (megawatt peak) and
meets the energy demands of 1000 Freiburg households/
year, enabling approximately 2000 metric tons/year of carbon
Freiburg municipal council land development directives
now stipulate with regard to land-use planning that green
roofs should be planted on rooftops with an incline of up
During recent sports facility renovations, for example, earth
collectors have been retrofitted so that fresh air required
in summer can be cooled and used for ventilation at 8°C
below outside temperatures, a significant improvement to
building insulation that helps prevent or minimize overheating.
Additionally, the earth collector can pre-heat outdoor
air in winter and help save even more energy.
Lord Mayor Martin HornCity of Freiburg im Breisgau, Germany