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Increasing the energy efficiency of buildings Solunska str. 31, Grigor Parlichev str. 2, Sv.Sv.Kiril i Metodii str. 5, Nadezda str. 30A, 30B, 32A, 32B, Sirma Voivoda str. 23,25,27,29,31 and Emanuil Vaskidovich str. 5 in Sandanski, Municipality of Sandanski.