GREEN BUILDINGS RATING SYSTEMS 1من   اصل4

Dr. Riham   Nady   Faragallah  
Lecturer, Department of Architectural Engineering Faculty of Engineering,
Pharos University in Alexandri  
Rating systems have been developed to measure. the sustainability level of
green buildings and provide the best practice experience in their highest
certification level.
With the given benchmarks, the design, the construction and operation of
sustainable buildings could be well certified. Using several criteria complied
in guidelines and checklists, building owners and operators are given a
comprehensive measurable impact on their buildings performance. The
criteria either only cover aspects of the building approach to sustainability,
like energy efficiency or they cover the whole building approach by
identifying performance in key areas I c sustainable site development,
human and environment health, water savings, materials selection, indoor
environmental quality, social aspects and economical quality.
Furthermore, the purpose of rating systems is to certify the different
features of sustainable development during the planning and construction
stages. The certification process means quality assurance for building
owners and users. There are important criteria for successful assessments
which are convenience, usability and adequate effort during the different
stages of the design process. The result of the assessment should be
showing transparent derivation and reliability. Structure of Rating Systems:
The different aspects are sorted in overall categories, like energy, ecology,
economy and social demands. For each aspect, one or more benchmarks
exist, which need to be verified in order to meet requirements or obtain
points. Depending on the method used, individual points are either added
up or initially weighed and then summed up to obtain the final result. The
number of points is ranked in the rating scale, which is divided into three
levels: the higher the number of points, the better the certification.