Environmental renovating solutions for Miljonprogrammet to reaching the EU2030 climate and energy framework goals

Sammanfattning: Climate change is one of the most severe threats that humanity is facing right now; it's ironically a threat that we as humans created ourselves. Residential buildings are the fourth largest source of Green-housegases in the EU and account for 10% of the total Green-house gases. In the summer of 2019, the EUcommittee approved the new EU2030 climate and energy framework to reduce greenhouse gas emissionsand increase renewable energy usage. A big problem for Stockholm are buildings constructed during theMiljonprogrammet, which ranged from 1964-1975 and have not had renovations since their construction.According to our study, companies are working hard to achieve climate and sustainability regulations set by the municipality, which in turn are highly correlated with the EU2030's climate and energy framework. The renovation strategy analysis showed that there is no perfect way or golden strategy torenovate the millionprogram buildings as the projects properties differ and require project-specificstrategies. The recommendation is to find the most optimal amount of insulation for the building, to insulate just to reach the EU 2030 goals is not an optimal solution from an investment standpoint. One significant problem we found when analyzing the renewable energy systems was the law that makes energy transfer between buildings illegal. We found that many companies have problems making aninvestment in solar energy profitable because of the low prices of selling back excess energy to the cities powergrid. According to the interviews, lifting the energy distribution law would make it easier for companies to make solar investment profitable. Furthermore, we found that residential energy storage isnot profitable from a price to efficiency standpoint. A lift of the energy distribution law would open new opportunities for companies to experiment with residential energy storage where more than one buildingis connected to the same storage unit.