4.4.2. Analysis of efficient use of energy Each of the works was to design electrical systems with various uses, so the way the electric system operating in each other also works. Every year, the cost of each building to pay for the operation of the electric system is very large, it depends on how the operate, how energy management and mechanical and electrical systems in buildings. With the current situation, the fuel source to generate electric energy in service life are gradually depleted, polluted environment because CO2 emissions, weather increasingly harsh (the greenhouse phenomenon). To meet the needs of larger energy use of buildings that still retain the balance for the environment. The Government and the departments have issued many circulars, decrees, normative legitimacy and encouraged the unit to use the energy saving and efficiency. The use of energy saving and efficiency of buildings through consumption of these buildings. By computing experience and the actual survey, we have synthesized was consumption of 50 buildings. And aggregate data of 16 types on is divided into 8 different groups as follows:• Group 1: Group State administrative office:The group includes types & BC02 BC01: Is the working headquarters of the subdivisions of the State. The following is a table of data of these buildings belong to group 1:
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