https://arts.wales/sites/default/files/2019-02/Emergence_Document_PDF_English.pdf
Energy Conservation Handbook
Energy Efficiency In Buildings Guidance for Facility Managers
Energy Efficiency In Buildings: Guidance For Facilities Managers
https://group.skanska.com/48dc86/siteassets/sustainability/environmental-responsibility/energy/unep_energy-effic-broch-final.pdf