With more than16 storeys, the apartment tower in Weingarten, a city district in Freiburg, Germany is the first residential high-rise worldwide to reach Passive House standards through energy renovation. With the support of the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg, the primary energy demand for heating, hot water, ventilation, lighting and electricity was reduced by 40 percent. For the first time ever, the heating demand of an apartment high-rise after renovation is reduced markedly to below 20 kWh/m² – comparable to a newly built passive house. The building heating demand after renovation amounts to about one fifth of its previous value, i.e. has been reduced by 80 percent.
Go to the press release at the The Fraunhofer Institute for Solar Energy Systems ISE to find out more specific information ..