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The research aims to verify the contribution to microclimatic comfort offered by the bioclimatic solar greenhouse at the ENEA Casaccia, F92 building. The analysis was carried out using the opensource software, EnergyPlus, for thermal simulation and dynamic energy diagnosis of buildings, based on the 3D geometric model built using the Google SketchUp software. The simulation led to evaluate the gained energy from solar radiation through the glazed surfaces due to the bioclimatic greenhouse and the consequent increase in the operating temperature of the internal environment during the winter season. The research moves from the most recent regulatory developments in terms of energy saving and more modern technology developments related to the design and construction of high energy performance solar control glass elements to demonstrate the effectiveness of bioclimatic greenhouse systems in improving internal comfort levels reducing non-renewable energy consumption for indoor air conditioning. The Temperature hourly trends showed an average increase in the operating T°, during the winter season of about 0.59°C.

In recent years, the interest in "green" solutions and in particular towards the use of green roofs and walls in an urban environment, not only for the reduction of the heat flow through the roofing due to the absorption of solar radiation and to its thermal inertia, but also for the mitigation of the heat island effect linked to the evapo-transpiration processes of plants. The benefits concerning comfort, and consequently the reduction of energy and economic costs, linked to the lower energy consumption for air conditioning under these green coverings, and the improvement of the quality of living in urban areas with a wider availability of green areas, which are often usable, are undeniable aspects of a "green" design and are widely investigated and documented. Only recently, however, research has started to address the issue of green design in terms of impacts in the life cycle, calculated according to the Life Cycle Assessment (LCA) methodology. In this research two equivalent coverings are compared in terms of summer thermal performance in the Mediterranean area: an extensive green roof and a 'high-permeation' tiles roof covering, compiling the environmental performance of the life cycle with the phases of production, use and end of life, based on Environmental Product Declaration (EPD) compliant to the EN15804 standard.