Approximately 80% of the design decisions that influence a building's energy performance are made by the designer in the early concept phase; the remaining 20% are made by engineers at the later phases of design. Therefore it is very important for design professionals to be able to utilise a quick and intuitive energy performance evaluation tool at the very early stage of the building design process.

EcoDesigner allows building design professionals to perform energy evaluation of their Virtual Building™ models. A fully integrated workflow makes energy evaluation just as easy to perform as generating a section or 3D view within the ArchiCAD building information model (BIM) environment. This allows designers to compare options about sustainability very easily and make appropriate design changes. Building geometric analysis and hour-by-hour weather data of a site location allows the calculation engine to perform dynamic building energy evaluation including annual consumption, carbon footprint and monthly energy balance of the building.