*{{en}}[cita web|http://www.iso.org/|International Organization for Standardization]|lingua=en}}
*{{en}}[cita web|http://www.cen.eu/|European Committee for Standardization]|lingua=en}}
*{{en}}[cita web|http://product-testing.eurofins.com/topics/green-buildings/leed-basics.aspx/|Summary of Indoor Environment Quality credits for material selection]|lingua=en}}
*[{{cita web|http://www.finestreaxen.it/axen/spip.php?article33|Dati sul risparmio energetico per le finestre in PVC con vetro bassoemissivo]}}
=== Altri sistemi nazionali per la classificazione energetica degli edifici ===