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Sustainability in the construction branch refers strongly to the service life of buildings. According to many literature studies, typical energy standard buildings are characterized by significant share of the operational phase on their life cycle, considering various environmental indicators. Thus, the kind of the energy source is very often the key factor influencing the results of building's Life Cycle Assessment.The innovative solution of cooling and heating system based on Peltier device is developed at Lublin University of Technology. The results obtained during laboratory tests (COP 0,767) as well as the results of Life Cycle Assessment procedure(GWP at the range of 0,22–0,9 gCO2eq/Wh) show that the developed system, after specific modifications, may be treated as environmentally friendly source of cooling and heating energy
