Energieffektiviserande åtgärder i samband med renovering av flerbostadshus

Sammanfattning: In Sweden, a big part of the energy use is used in the housing sector. Political goals and targets are set up which the housing sector needs to work towards. Apartment buildings are a major part of the housing sector in Sweden and therefore reduction of energy use in these kinds of buildings are key to lower the energy use in Sweden. But there are not only political incentives to reduce the energy use. Some energy‐saving measures are directly profitable and should thus be performed. Such measures are explored in this report with emphasis on both energy savings and profitability. The data in this paper has been compiled and calculated through interviews, visits to the property treated in the result and a number of lengthy calculations. Four main areas concerning energy use in apartment buildings save been identified. Areas of focus are heating, ventilation, hot water and electricity. Several techniques have been explored within each focus area and applied to an apartment building. When applying the model on the current property several techniques seemed to be profitable. Through the model heat recovery from hot water using waste heat exchanger was shown to be a profitable operation as well as installation of water‐saving shower heads. Additional insulation proved through the model to be a profitable and energy‐saving measure along with the window energy restoration of windows in good condition. Through the model installation of FTX system was shown to be a very expensive measure but still provided the highest energy saving among the techniques.