The study described in this paper focussed on the requirements of Life cycle Assessment (LCA) of HVAC system. The environmental behaviour of an HVAC system evaluated by LCA considers all the process necessary for components production, use and disposal. A database for Italian conditions was created for examining the environmental impacts of material, transport, land use and energy consumption of HVAC’s processing and management. The database is capable LCA of building services. The application of the methodology is proposed for there different heating systems i.e traditional, solar and heat pump systems for the energy requirements of residential buildings in Rome. The LCA was undertaken by means of Dutch Code SimaPro 5.0® in accordance to EcoIndicator 99. The LCA of the studies showed that the renewable energy sources (solar collectors) or high performance (heat pumps) cause low environmental damage for energy consumption but high impacts on global environmental balance of the plant production resulting from the components.
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