Design, built and manage an energy saving building may be a hard and complicated task. Energy simulating can help you analyze the movement of energy through space and volume. The result can help designer make better choice to decrease price, improve efficiency, and decrease the affect to environment of buildings.

In a whole life-cycle of a building (about 30 years), the initial costs for design & construction take 36%, but the cost for operation and maintenance take 64%.

The costs for maintenance and operation more important than the total cost for designing and construction at least 2 times.

This clearly prove to us about the important of designing and managerment a energy efficient building