According to the the latest consensus reports by European Commission, buildings account for 40% of energy consumed in Europe. As well as 36% of CO2 emissions, continent-wide. The numbers are very similar in the United States. Apart from all the trouble this is causing our planet and eating away at our natural resources, that’s a lot of your money lost. These buildings are commercial and residential. So they include healthcare facilities, hotels, educational institutes, shopping malls, and mainly offices for companies in every industry. Each may or may not have its own method of building management.