The energy consumption of buildings in Hungary and other countries are much higher than would be necessary. Energy is becoming more expensive, fossil energy supplies are running out, and the continuously growing energy demand effect the environment in an increasing measure. The energy dependency of the European Union is expected to grow from the current 50% to 65% by the year 2030. The Kyoto Protocol was adopted in 2005, Hungary also joined to the objective that from 2008 to 2012 the EU countries are reducing the emission of greenhouse gases by 5.2% especially the CO2, because 94% of this emission is produced by the energy production and consumption. The energy consumption of buildings takes 40% of the total energy consumption within the EU. The current EU member countries must achieve 20% energy savings by the year 2020. In addition to the negative environmental impacts, financial considerations also play a role. The outdated technologies, the wrong insulations and the wasteful or just badly designed lighting are all using unnecessary energy.
Due to these facts the Budapest Electricity Works (ELMŰ) and the North Hungarian Electricity Utility (ÉMÁSZ), as utilities are consciously dealing with energy efficiency and setting an example for their consumers, so with the help of the RWE AG (Rheinisch-Westfälisches Elektrizitätswerk AG), their owner, they have developed a new service in accordance with the guidelines of the European Union, which is called: Energy Audit. 
Over the past years as a trainee engineer, I participated in the work of the Audit group at the company ELMŰ. During this time, I have been involved in energy efficiency studies and the related measurements at nine large consumers. Using my experience which I acquired during my work, I show the steps of the energy audit, and describe my proposals for energy savings.