Recent concerns about the impact of global warming upon the world's climates and increased pollution and despoilation of natural habitats have introduced the concept of environmental and ecological sustainability as a criterion against which to judge all human activity. Nowhere are these issues more critical than in the creation of the world's built environments. The built environment consumes energy and resources in its making and also in its day to day operation. The complex pattern of human habitats so formed are intimately connected to both natural and man-made energy and resource flow networks. The making of these habitats, therefore, requires knowledge of how the actions of individual designers, planners, builders and users of these habitats interacts with these energy and resource flows.

Thus, one of the greatest challenges facing all involved in this process is the creation of a future built environment which not only continues to fulfil all of the traditional social, aesthetic and functional requirements of human settlements but also minimises its impact upon the natural environment by limiting what is taken from it and given back to it. In other words, the challenge is to create a more sustainable built environment.

Sustainable Design Facilitation focuses the design team on developing integrated, multi-disciplinary solutions. We can achieve optimization across the whole building, not individual systems. The result is more intelligent, holistic design, leading to reduced construction costs and dramatically improved long term operating costs.Dongleonl's experienced speacialists use their combined knowledge of sustainable design opportunities, building envelope knowledge, energy modeling capabilities, successful team dynamics and design practices to enable a project team to effectively adopt new procedures and technologies.

Typical projects:

• Energy simulation
• Natural ventilation
• Daylight simulation
• Dynamic thermal simulation
• CFD simulation
• Whole building air flows
• Envelope thermal performance
• solar shading
• site and orientation
• solar hot water
• Thermal comfort
• Pedestrian wind environment