Improving the energy efficiency of residential buildings is of paramount importance to reduce CO2 emissions and hence to achieve a climate-neutral building stock - the objective of the German government for 2045. Thereby, a focus on the existing building stock is needed, as regulations for new...

The German government aims at a climate-neutral building stock by 2050 to reach the goals defined in the Climate Action Plan 2050. Increasing the energy efficiency of existing buildings is therefore a high priority. For this purpose, investments of private homeowners will play a major role since...

Residential heating accounts for almost one-fifth of Germany’s final energy consumption. This report evaluates an extensive database of heating bills for buildings with two or more apartments, representing more than two-thirds of the total housing stock in Germany. Despite commitments to...

This paper explores the impact of retrofitting single-family residential buildings in historic districts with energy efficiency measures that are compliant with the 2012 version of the International Energy Conservation Code (IECC). This study focuses on Sears's kit homes that were built in the...