The activity of "build" has a significant impact on the natural environment and social life of every person.
Task for us architects is to promote sustainable construction to provide maximum comfort to the people with the lower environmental impact. Building sustainable means to drastically reduce energy consumption, promote the use of renewable energy and eco-friendly materials, carefully evaluate the microclimate of a place, apply bioclimatic principles and all active and passive technologies with low environmental impact. A building is sustainable if the whole life cycle "cradle to grave" is calculated and minimized.
This is possible only through an integrated approach to the design aimed at understanding the multiple factors involved and influence the environmental comfort and quality housing.
The “low energy buildings and even more nearly zero-energy buildings now represent a concrete solution in terms of energy, environmental and economic in response to growing environmental problems resulting from the use of fossil fuels and excessive CO2 emissions. These buildings are designed to offer high levels of comfort for all the year through innovative technologies use and design strategies. For example, an extremely efficient envelope characterized by high-insulated walls, windows, high performance thermal sized to maximize solar gains during winter and screened for control of summer overheating, thermal bridges almost absent, high air tightness can make superfluous the installation of a traditional system. Concrete example are the buildings made according to standard "passivhaus", where annual energy consumption has consistently amounted to less than 15 kWh per square meter of living space (equivalent 1,5 liter of oil or 3 m3 of gas).