The LEED standards set out the requirements for constructing environmentally friendly buildings,
able to operate in a sustainable and self-sufficient manner on an energetics level. LEED is a flexible
and articulated system that provides different formulations for new construction, existing buildings,
schools, small dwellings, while maintaining a basic approach coherent among the various fields.
The system is based on the attribution of criteria for each of the requirements that characterise the sustainability of the building. The level of certification obtained is derived from the sum of the credits. The criteria are grouped into six categories, which envision obligatory prescriptive prerequisites and a number of environmental performances, which together define the final score of the building:
Adding up the consequential credits in each of the six categories, a specific level of certification is obtained, attesting to the performance achieved from the building in environmental and sustainability terms. Addressing the whole process (from design to actual construction) and to every part of the building, the LEED analyzes every possibility to reduce environmental impacts of various kinds and noxious emissions from buildings under construction. The Asacert engineers and professionals, use the "best practices" as guidelines to perform the certification of buildings. Asacert releases attestations of energetic qualification with their calculation and classification methods, respectively, used.