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Green building refers to the construction of the whole life cycle, maximize resource conservation, energy conservation, land, water, and materials), to protect the environment and reduce pollution, provide people with healthy, applicable and efficient use of space, and the natural harmonious coexistence of architecture.

Green buildings are also known as sustainable development buildings, ecological buildings, returning to nature buildings, energy conservation and environmental protection buildings, etc., which are one of the effective ways to achieve sustainable development of the construction industry. It is reported that Canada will take advantage of BIM technology in the construction process to realize this idealized concept.
"For the next 20 or 30 years in the construction industry, I will say that BIM (building information model system) as a new green design approach will revolutionize the construction industry." Smith, Dennis, a architectural design company has more than 12000 employees, vice President of BIM as described for the meaning of green building, he believes that one of the best tool to project success is the application of computer information processing.

Through computer modeling, energy audit can be carried out through computer modeling. Many cases show that energy waste is mainly due to excessive air flow in and out of indoor and outdoor air, inadequate heat preservation and inefficient heating and ventilation systems. Through the transformation and optimization of these problems, we can save 30% to 50% of the energy use. Assuming that the full life cycle of the building is over 40 years, it takes only five years to recoup the cost. Therefore, the owners, developers and designers have been more active in the evaluation and demand of green buildings.

The advantages of BIM technology are more obvious for new buildings. In Canada, owners and developers have entered into energy consumption contracts with the design company, which is a minimum standard for energy conservation. At this point, the design company will pass BIM integrated computer program, such as energy model to easily measure how much heat and power the building structure needs, providing precise reference for the design. In addition, the technology could significantly increase the number and speed of building blocks for designers and developers. At the same time, the later use of these buildings provides abundant data feedback for BIM to make it more scientific and practical.

"Previously, we may be able to structure and owner interminably debate, now, need only on the computer simulation prove which scheme is more efficient. Moreover, we will use BIM system, urban residents life development and sustainable development of the integration of the natural environment." "Smith says.

At present, Canada's second-largest telecom company Telus in British Columbia is building a $750 million by the investment of commercial complex, including residential, commercial buildings and public Spaces such as parks. The design goal of the business complex is the highest level of green buildings in the area, with the application of BIM, the company's vice President of strategy said. According to him, it will be a landmark building, not just for today, even if the next 30 years, people who walk here also praised the architectural design of advance and its contribution to the environment.