From indicators to strategies: Key Performance Strategies for sustainable energy use in Portuguese school buildings

- User behaviour factors impacting energy in schools were identified.
- Schools energy Key Performance Indicators were assessed.
- Energy consumption has increased up to 200% in the last five years.
- A variation of more than 3 among cases validates room for improvement.
- Six Key Performance Strategies to enhance schools sustainability are presented.
- Time is a factor strongly influencing users' decision-making to achieve comfort.