The ‘Trias’ principle means that the use – i.e. depletion – of energy and raw materials is minimized and optimised. This will also reduce the life cycle costs of the design.

The ‘Trias Energetica’ design principle is aimed at minimising the use of finite (i.e. non-renewable) resources. It is a three-step strategy for producing an energy-efficient and resource-efficient design, and consequently also a strategy for reducing CO2 emissions. The three steps of the Trias Energetica are as follows:

  1. Limit demand and prevent unnecessary use and waste
  2. Use renewable sources for energy, and use waste as a resource
  3. Make efficient use of any non-renewable sources needed to meet the remaining demand
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