4.2. Analyze architectural elements: To hit the price of a work have reached the criteria using the energy saving and efficiency, the factors about the crust works or architectural works is called be greatly appreciate. In which the shells of buildings which are split up into elements such as: the wall covering, roof works, window, glass ... We can evaluate the 50 works according to these elements as follows:4.2.1. main wall Type: Is the type of wall area proportion than for comparison with the total area of the wall surround. The main wall can build using different materials such as: brick, hollow; brick-, gas-, featured, silicates; the concrete-reinforced steel; or maybe by glass ... Each wall has the value of different heat transmission, affecting the ability of insulation works. This is the data collected from the 50 works were surveyed:
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